I have noticed several posters with bad Karma points... posters that I am familiar with their posting style and wondered why on Earth anyone would bad Karma them.

IMO, this is a potential problem with the Karma system... people using the Karma feature in place of the thread rating system. Using this as a way to voice disagreement or disapproval of a single thread or post seems to defeat the idea somehow.

Have I misunderstood how the Karma points are designed to be used...
or is it okay to

for no apparent reason?