I came across this interesting quote about Che Guevara t-shirts, though I can't remember the article it was in.
"These T-shirts send a message, which effectively boils down to this: I have vague left-wing sympathies but don't read history. I am educated enough to want nonconformity but not intelligent enough to avoid conformity. I believe in supporting the wretched of the earth but happily purchase products from multinational corporations."