Barry is a marijuana legalization advocate who is trying to get citizens of Los Santos behind his grass roots campaign. In defense of his position that pot should be legal, he generally spouts anti-establishment rhetoric and extolls the virtues of smoking marijuana. He apparently grows his own weed and carries joints with him so that he can coerce listeners into partaking in hopes of swaying their opinion toward legalization.
Sadly, Barry probably partakes in a little too much of his own herb to be a truly effective advocate.
Barry appears in the following Strangers and Freaks side missions: