http://predestinationgame.com/community/index.php
uses a "thread karma" system - only no one uses it.
Sure, I got a few "coins" for some threads but it's so low it's not statistically relevant. Ergo useless.
Personal karma, like on the Stardock forums, is even worse.
You get as much karma for cool and funny posts as for useful ideas. Mostly for funny posts, though, because
my posts (about very specific and simple issues) usually end up as a Wall Of Text with multiple levels of bullet points that few can be arsed to read. Or figure out.
You can't directly attach the "value" of an idea or the amount of effort put into a concept to a thread, either.
Take a look
at this. This would be worth "1 karma" because frankly, no one would bother to rate every individual post.
Effectively it's "worth" as much as a picture of a farting rhinoceros.
So in theory, karma systems are a good thing. In practice, they do not tell a developer anything
useful.
Sure, you could attach a poll to every thread. Could it get even more annoying?
There is no "I" in Tea. That would be gross
.