Guilt by Association Fallacy:
Four Subcategories:
Guilt by kinship: Connecting someone to relations that are less-than-spectacular and claiming that this person is just like them because they're related. This is faulty logic because one member of the family being proven guilty of something does not mean that other relations are guilty.
Example: Dale's uncle, Jeb, stole my goat; therefore, Dale is a terrible person.
Guilt by verbal association: Because one person expresses some views similar to someone else's, s/he is not necessarily in agreement with everything that person says or does.
Example: Like Charles Manson, Todd enjoys a well-written folk song now and then; therefore, Todd must also enjoy manipulating women into committing horrific murders.
Guilt by physical association: Because one person associates with guilty figures, s/he is not necessarily guilty of anything.
Example: In 2012, several of Mr. Spagnolo's former students were arrested. Because he has associated with them, he must also be guilty of something terrible. Lock him up!
Innocence by association: Because one person associates with figures who are known to be innocent, they are not necessarily innocent, too.
Example: The slew of Mr. Spagnolo's former students who were arrested in 2012 are associates Mr. Spagnolo, and he is known to be 100% innocent of any wrongdoing, ever; therefore, they must also be innocent.