A thread by spammers at Black Hat World figuring out how to crack Craigslist’s phone verification requirements, which is now being infiltrated by BoingBoing readers.

Don’t stop there though, read through other topics and threads. This is the dark underbelly of the web, and I could spend hours here, locked and in deep focus, learning how these guys seek to game, infiltrate, manipulate and exploit every system to their advantage. And how they’re succeeding.