For use on forums.
For someone to be toposting it means that they write epically long posts not answering the topic at hand, but subliminally assuring some sort of higher knowledge than the rest of the members.
But, just because you need ways to differentiate between people and things doesn't mean you have to raise the labling to a level of mindless hysteria.
-Dude, WTF? We asked what the borderline between racism and stereotyping is! Stop Toposting damn it!