Anyone can rate a thread. There is a "Rate Thread" button on the top right of each thread you open. You can rate from 5-1 stars. I am not sure why we have it, but some folks like it.
I know on some boards you can also affect a members "Reputation" with a similar rating system. We don't have that though.
You're only given a little spark of madness. You mustn't lose it. Robin Williams