You might want to check out this Craigslist Missed Connections post:
Anyway, both of you should be ashamed of yourselves (not to mention arrested). The hills ECHO, you guys. LOUDLY. We – all of us – could hear every rustle of your khaki cargo pants, every step in your black hiking socks. Every gasp. Every exaggerated moan. I shudder to think of what that poor mother told her daughters in the car after their pleasant outing came to an abrupt and awkward end.
Couple Having Sex in Griffith Park Last Monday, just because you can’t see anyone nearby, that doesn’t mean you are alone. Next time you feel the urge to spice up your mechanical, lackluster relationship, don’t get naked in a public place. You risk bug bites, getting dirt in your naughty parts, getting caught by unsuspecting families…
Though, from the sound of it, I’m not sure how “missed” the connection really was.