I have thought about this isue, it very unfortunate that many forum users are found of giving themselves karma, and is very obvious that some of these guys that are getting these karmas are doing it without merit, and even their posts are nothing to write home about.
I think admin has to adjust the kama awards rules because it not helping the forum. I have also warned few guys spamming , and i think a more serious penalty should be in place to curtail these ugly behaviors.