Not only do you have Redux, which is a link/music/video sharing social web site which is actually covert matchmaking, there's also okcupid, which is a matchmaking site that's used by many as a covert link/music/video sharing social web site.

Exactly.

It's interesting to me that users so often do the opposite of what they came to do.

Or to paraphrase William Gibson: The Street finds its own use for technology.

And often it involves getting laid. I'm waiting for location-aware GPS smartphone apps to address this big time.

Bait & Switch.

Howso?

He was looking to get laid, apparently.