How about fanboys trying to count how many leaves render on background trees so they can claim that the 360 version of a game is "better" than the PS3 version, or vice-versa?
How about the review discussion, type A: Saying a game's good because of good reviews, or that a game sucks because it got bad reviews.
Or, review discussion, type B: Saying that reviews should be scrapped because a person happens to disagree with a reviewer.