What?
Doctor Raoul has been dressing up in "silly and foolish" costumes at FReeps for almost five years and guess what? He's not just caught the attention of the regular guy/gal on the street. He's caught the eye of the media, they come over and take pictures of him and the rest of us, and they ask questions. Then the pictures get published in newspapers, video is played on TV, our signs are seen by tens of thousands, our words are heard by at least that many, and I daresay - more than a few middle of the road folks learn facts that would otherwise likely not have been reported by the media.
A costumed protester may look silly to you, but it's far from foolish.
If you organize a FReep in your area, it is your call, of course. Good luck, whatever dress code you decide on.
Besides, if we have a devil dude, they'll say we're copying, we need something original of our own! :O)