seriously, in some topics, you dont even know a whole load of info and some idoit decides to rate it 1 star, its quite annoying.
It is being abused a lot. Mostly newbies post something really out of this world and then rate their own thread as 5 stars. While the other threads that really deserves 5 stars some people keep on rating it 1 star and the average falls down.
I wouldn't pay too much attention to that. A lot of times, people just go around giving 1 star without even reading the thread. It's just mean people - I would not worry about it too much.