Hello,
Here is a definition of smite:
http://www.answers.com/smite&r=67Applaud and Smite affects the karma of a member. You can use those when you find the poster either very interesting or very boring. It is a kind of self moderation by the users of the forum. You need a given number of posts before you can applaud or smite other. I'll check if we can modify this term. What would you propose instead?
The stars and the member level are triggered by the number of posts only. It helps readers to get an idea if you have been over here for a while or not.