it's also very specific. so for example 'save my' will block out save my contests but not anything with just 'save' or just 'my' in the topic title. conversely, 'nng' will block out hnnnggg no matter how many n's or g's they use (it's genius of me to have come up with this, I know) and adding the string of '>a, >b, etc.' will block out anyone who does that dumb 4chan post thing (because it hits any post with a > followed immediately by a letter) but won't remove every single post with a letter of the alphabet.
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machinery don't fail on me, I'm fixing these things as they're falling apart
http://i.imgur.com/PQGPX.png