Found here:
http://stupidfilter.org/demo.php
Shame it doesn't work too well. I like the idea, and I am hopeful, but this does not filter stupidity.
"This sucks."
Text is not likely to be stupid.
"Dis suxxors"
Text is not likely to be stupid.
"I once pooped all over your mom's face."
Text is not likely to be stupid.
"omfg wtf gay"
Text is not likely to be stupid.
"omfg wtf teh fucking ghey"
Text is not likely to be stupid.
"omfg lolxors cuntlogger"
Text is not likely to be stupid.
"Holy shit, there is a lot of stupid getting through dis thang!"
Text is likely to be stupid.
Oh yeah, that seems about right