Three ideas

Mat cutter with automatic habrakarma drop. For each mate - –0.5. If the mat is very necessary - the comment has a tick "offtopic", so that the comment automatically gets under the habrakat.

I think so, it is necessary to delete users with karma –200 :-) It will be an additional stimulation to increase karma.

By the way, it would be nice to create habra-coordinators in some densely populated cities for habrastvorych, habrapyanok.