Question: What did the demonstrators disguised themselves as?
About the article "Boston Tea Party", section "Abstract".

Candidate passages:
As protests continued, Greenpeace demonstrators chained themselves to the gates of the Australian Prime Minister's residence (The Lodge). 
Less than a month after the January mineriad, another anti-Communist manifestation took place in Bucharest (February 28).
Despite the demonstrators' pleas to non-violence, several persons started throwing stones into the Government building.
Riot police and army forces intervened to restore order, and on the same night, 4,000 miners headed to Bucharest.
Opposition leaders and independent media speculated that the demonstration was manipulated by Securitate and FSN.
Miners maintain their relative innocence of the violence, claiming that the agitation and most of the brutality was the work of Iliescu’s government agents who had infiltrated and disguised themselves as miners. 
On August 20, 2007, during meetings of the Security and Prosperity Partnership of North America in Montebello, three protesters were accused of being police provocateurs by Dave Coles, president of the Communications, Energy and Paperworkers Union of Canada.
The three masked protesters, one of whom was notably armed with a large rock, were asked to leave by protest organizers.
After the three protesters breached the police line, they were brought to the ground, handcuffed, and taken away.
The evidence that the arrested people were police provocateurs was circumstantial, including the fact that they were wearing boots identical to those worn by police.
According to veteran activist Harsha Walia, it was other participants in the black bloc who identified and exposed the undercover police.
After the protest, the police force initially denied then later admitted that three of their officers disguised themselves as demonstrators; however, they denied that the officers were provoking the crowd and instigating violence.
The police released a news release in French where they stated "At no time did the police of the Sûreté du Québec act as instigators or commit criminal acts" and that "at all times, they responded within their mandate to keep order and security". 
On occasion, police and security services have infiltrated black blocs, apparently for purposes of investigation.
Allegations first surfaced after several demonstrations.
At the 2001 G8 summit in Genoa, amongst the many complaints about the police there was mention of video footage which "suggests that men in black were seen getting out of police vans near protest marches."
In August 2007, Quebec police admitted that "their officers disguised themselves as demonstrators"in Montebello.
However, the officers did not engage in violence, and claimed that they were carrying rocks because other protesters were doing so.
They were identified by genuine protesters because of their police-issue footwear.
According to veteran activist Harsha Walia, it was other participants in the black bloc who identified and exposed the undercover police.
There is no evidence that the black bloc tactic is particularly vulnerable to infiltration, however, as investigatory - and even agent provocateur - activity has taken place regularly among completely nonviolent, non-black bloc campaigns.
In 2003, the Oakland, CA Police Dept infiltrated a group of demonstrators protesting police brutality and the war in Iraq at the port; subpoenaed private comments by Captain Howard Jordan indicate that his plan was to steer the march away from the police station in order to avoid confrontation.
In internal documents, Jordan mentioned this strategy was common in other police departments, including San Francisco and Seattle."
In August 2003, Faderhuset served a writ upon Ungdomshuset and its users and claimed ownership of the building.
In December the same year, the trial began at the Copenhagen County Court.
On 7 January 2004 the verdict from City Court arrived, stating that Faderhuset was entitled to sue four activists (rather than Ungdomshuset itself) since Ungdomshuset functions without a hierarchical management and is therefore not regarded as an organisation.
The court, however, denied Faderhuset compensation.
Both sides appealed against the decision; Faderhuset demanding compensation and Ungdomshuset demanding future right of usage.
On 28 August 2006 the National Court stated, as the City Court did, that the right of ownership and usage of Ungdomshuset belonged to Faderhuset and it was free to evict the inhabitants.
Originally, this decision ordered the current occupants out by 9:00 a.m. on the morning of 14 December 2006.
Ungdomshuset was also denied the right of appeal to the Supreme Court, meaning that they had no further options within the legal system.
The police, however, stated that they would not evict the activists until 2007.
The activists refused to leave the house and barricaded themselves inside.
In addition, an open-letter stating "Troublemakers of the World; We bid you Welcome!"
had been sent to different autonomous groups around the world, asking for help defending the house in the event of a forced eviction.
On 12 December, Faderhuset refused an offer from the foundation "Jagtvej 69" to sell the house for DKK 13 million.
On 16 December, around 2000 activists, some of them foreigners, demonstrated in Copenhagen in support of Ungdomshuset.
The police had not been notified of the demonstration.
The vanguard of the demonstration wore masks or helmets, which is not permitted by law during demonstrations in Denmark.
The police ordered the demonstration to break up and the demonstrators to disperse.
The demonstrators attacked the police; stones and fireworks were thrown at the police and burning barricades set up.
The demonstration degenerated into what the police characterised as the worst riots in Denmark in many years—they used teargas, which was a very rare occurrence in Denmark.
Both police and demonstrators were injured.
By the end of the night 273 people had been arrested.
The majority of those arrested were released the following day, 17 December.
The total number of demonstrators arrested was amongst the highest for a single event in Denmark since World War II.
The fury of the demonstrators was described by the police as the worst since 18 May 1993, when another violent demonstration (this time against Danish EU membership) by the extreme left injured 92 officers and 11 demonstrators.