Just south of San Francisco on highway 280 is a scenic vista / rest area. It has a beautiful view of the watershed area and is only accessible from the freeway. Except for me, who could ride thru on my mtn bike on my way to other places via a trail. whenever I passed thru I got the weirdest feeling from all the guys sitting in their cars ostensibly reading newspapers or eating lunch, but in actuality giving me creepy looks and hoping for a gay sex hook-up.
I asked my gay acquaintance why they don't just go to the bath houses for their dose of hairy gay butt, and he said it's because that's where the married men go for their butt piracy, so as to keep it on the down low.
One of the forest preserves near where I live has been absolutely overrun by those creeps. I've learned not to back (ahem) my car into a parking spot as that is the "signal." I've come to appreciate the place being flooded by Mexicans playing loud ranchero music on the weekends . . . at least they bring the wife and kids.
And no, I will not stop going. It's one of the few places in the NW Chicago suburbs where one can chill-out out doors and (legally) have a beer.