If somebody dresses up in strange clothing for a certain situation, it's not very weird that people might laugh. If somebody hangs around gas stations in a clown suit and tries to promote clownism to me, I might laugh as well.
BTW, why is it wrong for a man to humiliate a woman? What about men humiliating men, or women humiliating women? Pretty sexist if you ask me. In my view humiliating people is something to be avoided, wether they are male or female, unless they're asking for it.