Recently there's been quite a dustup about harrassment in conventions (PAX actually has blackshirts to walk around enforcing the "NO TOUCHING" rule). While GenCon has had some general rules, they've recently decided to make them more explicit.
You can read how it started here http://gamingaswomen.com/posts/2012/08/gencon-to-take-a-serious-stand-against-convention-harassment/
I am at once gratified that GenCon reacted so quickly to make their position clear and disgusted that we even need such a thing in place. So to make it perfectly clear to my players (and my GMs) the Guild of San Marcos will not tolerate such actions either. We're all here to have fun, and if you're making someone else uncomfortable, you will be asked to leave.
Now I know some of you may be saying, but Mark I have poor social skills/an inability to read social cues/(insert convenient excuse of the week here) so sometimes I do it without even knowing. How can I make sure I don't make others uncomfortable? Here's a real good article http://whatever.scalzi.com/2012/08/09/an-incomplete-guide-to-not-creeping/
Now that you've read it you have no more excuses...