I think the choice is theirs, not mine. If fetish dressers make the decision to go out to an inappropriate venue I'll roll my eyes with the rest of the public, but I just mark it down to "it takes all kinds." I don't see it as an assault on the transgender community because of course we'll have people who are over-the-top -- we're human beings. If that person is going to get hooted down, let them be hooted down for bad taste or poor judgement, not for the fact they're transgender. There are fetish men and fetish women who also appear in public and draw the same snarky reactions. I don't think we want to be better than everyone else, we just want to be the same.
I don't believe the "damage" they cause in the public's mind is greater than the damage we ourselves cause when we in-fight. If the transgender community plays its cards right, what should go mumbling through the crowd is "None of the transgender folks *I* know dress like that."