I protested the movie "Can't Stop The Music" in the mid-seventies. I hated disco plus many of my friends were band members and were having a hard time getting gigs because clubs were changing from live music to recorded disco music. I even remember my sign. "Please Stop The Music". :o
I also protested the second Iraqi war and was basically kicked out my Republican caucus and told I was Un-American for doing so.
My stand on gay rights and stem cell research didn't help.
I also boycotted Nestle products for many years because of their brainwashing of third world mothers about breast feeding and using their infant formula. Gee: Take your polluted water, mix in our formula and let your kids die of dysentery. It's OK because all the affluent mothers in Europe and the U.S. use our formula.
Nestle has since changed their marketing but they could do better.
I also now boycott another cruise site because I mentioned that I was on a group cruise with people from "another board" and got banned for ten days. :o