I agree with KPfreak519, including his distinction between the other two posters' attitudes.
It's important to be firm and keep a respectable forum in good shape on content - no question about that. There are other places for the attitude-challenged to go, and their posting histories will show exactly who they are. In a place like this, where the notions of respect and positive contribution are valued, legitimate "problem posters" invite whatever they get... be it ridicule, the business end of a flamethrower, or the Banhammer of Thor.
For the rest, who are more earnest and honest but still might manage to wander outside the lines, could firm course corrections be doled out in the same spirit of mutual respect that otherwise pervades the site? These aren't the troublemakers -- they just strayed a bit. No need to resemble the bad behavior while rejecting the same, in my opinion.
I, too, don't post much. But I tremendously enjoy this place and everything that goes into it - including the effort needed to efficiently weed out the genuinely bad apples.
And Gatekeeper looks AWESOME. Can't wait to give it a spin!
Edit: just saw the previous note to get back on topic. Hint taken.