I boycott stuff quite often.
Currently, I'm boycotting all Paramount Pictures films and refusing to purchase merchandise based on Viacom-owned properties because of Viacom's overreaching lawsuit against YouTube. Too bad I seemed to be the only one, given the grosses of "Star Trek" and "Transformers."
I'm also boycotting any artist who either by him or herself or by proxy (through a sanctioned associate or significant other) personally belittles me with racially charged terms or stereotypes. This is happening far too often for my liking and people are still getting away with it. Come on, it's 2009 already.