Anyone who has the authority and ability to control another person who infringes any of the exclusive rights and who derives a financial benefit therefrom is vicariously liable for the infringement of another person. Generally, you can not use another person's trademark if that use would confuse the reasonable consumer about the identity of goods or services associated with that trademark. But, some trademarks are so distinctive that they get broader protection than this. Generally, you cannot use another person's trademark if that use would confuse the reasonable consumer about the identity of goods or services associated with that trademark among consumers. Libel is defamation by writing.
Defamation is a statement that harms the reputation of someone else.
The important point is reputation . In order to defame, the statement must either lower the victim's standing in the eyes of the community, or tend to make others refrain from associating with the victim. The writing must be made to someone else, it must be the type that generally affects reputation, and it must, in fact, affect reputation. The law of libel was born in the era of newspapers where editors read through everything before anything was published. The newspaper could exercise some control over what it published and because of this control, it made sense to hold the newspaper liable for libel.