Question: Why did the actor who played Leo on "That 70's Show" stop touring with "The Marijuana-logues?"
Context: Terry Chambers (born 18 July 1955) is an English drummer and was a founding member of the band XTC, appearing on the "3D - EP", "White Music", "Go 2", "Drums and Wires", "Black Sea", "English Settlement", and many live recordings, until his departure from the band during the 1982 sessions for "Mummer".  On "Mummer" he played on "Beating of Hearts", "Wonderland" and the B-side "Toys".  Chambers' reasons for leaving the band included the band's decision to stop touring and performing live, as well his own plans with his Australian girlfriend, with whom he subsequently migrated to New South Wales. Freeze is the tenth studio album by Dutch rock and roll and blues group Herman Brood & His Wild Romance.  The album reached #63 on the Dutch album chart on 3 November 1990, and stayed on the chart for 5 weeks.  Brood, who had just won the 1989 Popprijs, one of the highest Dutch awards for popular music, recorded "Freeze" with the help of Clarence Clemons of the E Street Band and Tejano accordion player Flaco Jiménez.  Lack of success for this album leads Brood to stop touring. Alexander Andryushkin (born c. 1964 in Tyumen, Siberia, Russia) is a drummer.  His father was a violinist and a conductor in a symphony orchestra.  He is influenced by Deep Purple, Sweetwater, Led Zeppelin, and Pink Floyd.  From 1994 to 2006, he played drums in Egor Letov's Band Grazhdanskaya Oborona.  He recorded the album "Dolgaya Schastlivaya Zhizn" with the group and toured extensively with them in Russia, Ukraine, The United States, and Kazakhstan.  With the group, he played in front of 19,000 fans in Moscow.  In late 2005, he had a falling out with Grazhdanskaya Oborona members and decided to stop touring with them and quit in 2006.  He was replaced by Pavel Peretolchin in 2006. The Marijuana-Logues is an Off-Broadway comedy show in New York City.  Arj Barker, Doug Benson and Tony Camin are the creators and performers.  It is a four-man stand-up comedy show, with the majority of the humor centered on the drug marijuana.  The show's title is a play on the long-running Broadway show "The Vagina Monologues."  The show began its run in March 2004.  There is also an original cast recording released in 2004 by Comedy Central, and a book.  When the show toured, actor Tommy Chong became part of the tour for two cities.  His legal concerns, including that audience members were actually smoking marijuana at some of the shows early in its tour, and pressure from his probation officer ultimately caused him to leave the show. Live 93 is a live album released in 1993 by The Orb on Island Records.  "Live 93" is a collection of highlights from The Orb's 1993 performances in Europe and Asia.  It features The Orb's live performance crew of Alex Paterson, Kris Weston, producers Nick Burton and Simon Phillips, as well as audio engineer Andy Hughes, who had stepped in when Weston decided to stop touring.  The album cover of a sheep over a power station is a parody of the cover of Pink Floyd's "Animals", an album cover they had previously parodied on the cover of "".  The album reached #23 on the UK Album Chart. Séan McCann "The Shantyman" (born May 22, 1967, Carbonear, Newfoundland and Labrador, Canada) is a singer and musician (playing bodhran, shakers, tin whistle and guitar) in his former band Great Big Sea.  He announced plans to stop touring with the band at the end of December 2013. Dinosaurus Stereophonicus is the eighth album by the Finnish rock group CMX, released in 2000.  It was recorded after the band had decided to stop touring and become a full-time studio band.  The decision only lasted till 2002. Charles John Rowe is an English actor.  His film roles include Young Tommy in "Never Let Me Go", James in "The Boat That Rocked", Billy Costa in "The Golden Compass" , Peter in the SyFy/Sky Movies Peter Pan prequel "Neverland", and recently played Leo Roth on the Fox medical comedy-drama series "Red Band Society" alongside Octavia Spencer and Dave Annable. Thomas B. Kin Chong (born May 24, 1938) is a Canadian-American comedian, actor, writer, and cannabis rights activist who is known for his marijuana-themed Cheech & Chong comedy albums and movies with Cheech Marin, as well as playing the character Leo on Fox's "That '70s Show".  He became a naturalized United States citizen in the late 1980s. Ghilherme Lobo (February 8, 1995) is a Brazilian actor best known for the short film "Eu Não Quero Voltar Sozinho" and the film "Hoje Eu Quero Voltar Sozinho", in which he played Leo, a blind, gay teenage boy.
Answer: pressure from his probation officer