Sure I boycott. I wanted a Glock for a long time, and now I'm the proud owner of an XD. I generally don't boycott every anti company, but I don't mind boycotting the ones who are directly involved, like Glock.
If I think I should have guns, and the ice cream man thinks that I shouldn't, that's not a big problem for me.
HOWEVER, if I think that I should have guns, and the guy that makes guns says, "I sell guns, but I don't think that YOU should be able to buy them," or some other stupid stuff (Glock) then I usually will take my business elsewhere.
That being said, I think there's several reasons to stay away from Ben and Jerry. (They even SOUND like a gay company, IMO)