"...your visitor will have a limited amount of time (specified by you) to fill in the form and send it. And if a spammer tries to post information to your form processor remotely they’re going to hit a big fat roadblock."
Matt's SXSW talk has lessons from 11 years of moderating a large online community. Quick summary: get the community to help, find patterns that lead to good/bad behavior, build tools around those patterns, find awesome moderators.
This is even better than the Chrome extension: "If you don't like a site that appears in your search results, you can block all the pages within that site. Then you won't see any of those pages when you're signed in and searching on Google."
"I am firmly of the opinion that the Macintosh is Catholic and that DOS is Protestant." heh, Umberto Eco weighed in on the Mac vs. PC war in 1994 by comparing the organization of operating systems with the organization of religions.
Matt Thompson discusses some ways Jessamyn approaches moderation at MetaFilter. This is great: "Let me model some good behavior for you. That person said something really s---y. I’m just going to ignore it. Watch me."