From the Ideas Whose Time Have Come department:
A team of American scientists are developing the "StupidFilter" - an open-source filter software that will be able to detect "rampant stupidity" of web-content in written English. Similarly to the way spam recognizing software detects suspicious e-mails, the "StupidFilter" will look for pre-fed words or sign combinations that characterize stupidity, assigning particular tokens with different weights based on how often they occur in hand-picked examples of idiotic comments. The developers are using weighted Bayesian analysis along with some rules-based processing, similar to spam detection engines, in order to efficiently distinguish unacceptable messages among the submitted texts.
Aren't you just trying to eliminate comments and discourse that you consider to be stupid?
As much as that might be nice, no. The StupidFilter does not understand, in a meaningful sense, the text that it parses, and our graders select comments that are formally stupid -- that is, their diction, not their content, marks them as stupid. It is not our intent to eliminate debate or disagreement, but rather to programmatically enforce a certain quality of expression. Put another way: The StupidFilter will cheerfully approve an eloquent, properly-capitalized defense of mandatory, state-subsidized rocket-launcher ownership for all schoolchildren.