It's not binary. It's not black and white. There's such a thing as asking someone to avert their eyes, to stop staring, to not touch you. I don't like being touched in bars. You know what I do when a random drunkard puts him arm around me because I'm obviously to him his new best buddy? I slide his arm off and tell him not to put his arm on me. If someone wanted to take a picture of me and I didn't want to be touched, I'd tell them. I've done it before while at charity events (zombie walks). I've had people ask can they bite me and I've told them for obvious reasons, no but if they want to make it look like it that's cool, just don't actually put your mouth or teeth on me.
Regular female attendees shouldn't have to put up with that. You're okay with throwing out the frat boys, but are you also okay with throwing out the guys whose gaze lingers a bit too long on a chest, or who put an unwanted hand on the small of a cosplayers back?
I can understand how for someone it might get annoying after a while to be stopped every few minutes to be asked for a picture and to have someone put their arm around you, but honestly, it's not difficult to say "ok sure, but please don't touch me" or even better yet "no sorry, I haven't the time".
No? I'm not okay with that to be honest, because it barely seems like an issue does it? Except if you're the woman, and it's 100s of guys doing this, it's half the attendees staring at you, it's everyone wanting a photo and thinking that gives them the right to touch you. It's not individual instances of gross misconduct, it's the sum total of 100s of instances of small amounts of objectification, personal space invasion and disrespect. Stuff that you can't throw someone out for because it's 'harmless' but that builds up to making female attendees very uncomfortable.
I think people and women in particular should be able to dress up as whatever character they want at cons and I wish they didn't have to put up with getting shit. But they're going to get shit with booth babes around or not. The woman who went dressed as Black Cat to NYCC last year and ended up on blog sites complaining, wasn't the victim of her events because of some booth babes making all the guys go crazy and think it was ok. She was the victim because those dudes were assholes in the first place.
And part of that's because of booth models being put there specifically to attract that sort of behaviour.
If we want to do this by tackling attendee behaviour directly then fine, but that means throwing out half your attendees. Probably you included.