I wonder if it's a lot of guys finally experiencing the "female" side of things, and it's scary being in the non-dominant position. Men getting hit on/groped by creepy gay guys is no different than women getting hit on/groped by creepy hetero guys.
Also, there is a selection bias when it comes to "gay" behaviors. You remember the ones that are the most flamboyant, while you pay no attention to the regular old joes going about their everyday lives. I know lots of gay men, but only one you could really guess was gay. Most people on here probably know many gay people, they just don't know it!
Yeah I know a lot of gay people who can easily pass for hetero, the only thing that gives them away is their manicures. What is so wrong with a flaming homosexual though? What's wrong with being overtly feminine, those are the ones those straight folk shouldn't worry about because they're on their radar to ~*~STAY AWAY~*~ from where as them breeder camouflaged homosexuals can take you up from behind when ya least expect it!