"I normally don't fall into the mindset of "well if you dress that way, then you are asking for it!", but if you walk into a room with your tits hanging out, a thong instead of pants, and stripper boots on then you kind of deserve to be oogled a bit.
Touched or harassed: hell no. But oogled, yea.
I mean, I spent 60 seconds and found 3 awesome! cosplays that are epic looking but are not sexual in anyway and another that is the same character as one of Nigri's cosplays, but not all sexed up.
Its a choice that these female cosplayers have to make: do you cosplay a sexed up character that was designed in the first place to make a dude's mind nose dive into the gutter or do you choose an equally awesome cosplay that doesn't objectify your body in such a way that makes you look like an over-dressed stripper?
That's not to say you can't cosplay as a sexy character, but you don't need to take an unsexy character and turn it some sexed up 14 year old's confusing wet dream."