As a male, I find it highly depressing that other males feel its OK to act this way. Or even want to.
I'm guessing from my own long time experience as a geek in the industry that you're either overdramatising this A WHOLE LOT, or you are VERY attractive. If its the former, shame on you.
Assuming then its the latter, you're probably also used to being approached innaropriately by men in every situation, not just at geeky trade shows or whatever, so again shame on you for singling geeks out for public discreditation when in fact its more than likely that geeks aren't really any worse than anyone else.
If indeed you are very attractive, You proably think its tough being you, but I can guarantee it actually has more upsides than downsides. You know, all the extra help and consideration you get from guys when you want/need it? Or the fact that going out for an evening doesn't necessarily mean you need to drive, buy tickets, food, drinks or even take any money? You probably just think they're just "being nice" and would do that for anyone, even other guys, right?
The reality is that society is unfortunately still such that guys are the ones who are expected to work hard and put ourselves, our hearts and the fruits of our hard work out there to find/establish relationships, as most women who normally claim they want equality still conveniently rationalise ways that equality stops at having to actually pay their own way, especially on dates, or even just asking guys out. So, until that gets fixed by equality-driven women actually stepping up and taking on a truly equal role, your gender, especially the more attractive ones, are going to have to deal with all the down sides of (admittedly sometimes clumsily implemented) approaches and all the other benefits you actually get.