I think that is part of the problem. People see the posts in their own light and in their own eyes. They will zap what they zap. It is hard for the staff to direct the zapping if all the stackers do not agree on what is good zapping practice. If you just leave it alone, let people zap what they will zap you will continue getting the results you are getting. I also think that posters zap comments to increase the comments on their posts. I guess you could call this a form of assmilking, if you will.