It's no big shock, but I like to give disaproving ratiings to user reviews on gamespot. Why? Because most of the one's I see are badly written, have poor grammer, and look like something a 12 year old wrote (in their defence they probably are 12.. >.>)

I give the "not helpful" click because I don't find their review helpful. A review is a detailed form of someone's opinion on the features of the game, both GOOD and BAD, in order to allow someone to see where the consensus feeling about the game is.

A review is not however, this, "omgokzoo90ot ITZ LYKE THE BESTERO0OR GAME EVAAAAAAA! I GIVE IT PERFCAVT 10 OUTTA 10 OMHOMOZK9KT9KOZKOGKDNDBJDB!!!!" That's just stupid.

It's also not a gushing over-glorification of the game. In some circumstances, I see review's where a flaw of the game is outlined, but then is mentioned later in the review as a positive. WTF?

Oh, and I also have a problem with people rating my reviews as non helpful. I try to write a good review everytime. I try to form a fair judgement on the game based on it's good's and bad's. I don't however, submit to stupidity to review or score a game. I actually use proper grammer and spelling (though sometimes I don't. But don't say anything =p)