I thing i know who is doing that, but i don't really care, i personally find my self applauding members more often some times for no apparent reason. lol.
The bad karma to a user in a hacking forum when i join, it makes me believe that this user he may be a "malicious" one.
But the most of us here we all ready should know that karma is very generic, there are a lot of users with negative karma and actually they offer a lot to the forum, and some with positive karma that their posts is at least not important.
I also have a good karma although i don't contribute much, and do some trolling
here and then, you know just for fun.
ps: you smite lover i want you to know that i admire you and i thing you done a great job with the smiting so....you know you can consider me a friend.ok
* EDIT
The one thing that annoys me is when i see people smite some new 1st posters members, we must be lenient with new guys, we are here also to change the way some people think even if they started with the wrong way, ofc. there are exceptions always.