This has been issue since I've started coming here. I then joined the forums thinking I could be a voice of reason. I wrote a well thought out and well edited article discussing fanboyism and it was received well by those sensible members. I was met with resistence from troll/fanboy types.
As for what ssj12 said, if it's serious report it. Unfortunately in my experiance much of the behavior isn't banworthy, though it is still highly opinionated troll speak that is detrimental to the community here. It's like this, can you arrest someone for being a jerk? Usually not, but you still are going to dislike that person and get upset. That's how I feel about things around here.
It's really not VGChartz or the moderators fault. This is the state of the internet and humanity. The moderators could try to be harsher, and I would support that. But there would be a lot of angry trollkind yelling "Unfair!"
In my experiance here the best way to deal with trolls is to give them the quick, "Your trolling/fanboyism isn't appreciated" and then ignore them.
