http://stupidfilter.org/main/

An effort to recognize (and filter out) stupidity in blog comments via weighted Bayesian analysis. Useful for filtering out excessive “LOLs” and too many text-message style abbreviations, I think this is a brilliant idea.

Also, love this from their FAQ (emphasis in italics mine):

Q: Do you really expect to be able to detect and filter anything that’s conceivably stupid?
A: No, of course not. You’d need real AI for that, and beyond a certain point it’s simply subjective; after all, a sufficiently advanced AI would probably filter out the whole of human discourse, which isn’t the idea.