I don't want to muck-rake but a (long) while ago videogamecritic got a lot of flak over on the DC GameFAQs message board - somebody would always pop in making topics about how great he was (to the point of being ridiculous/a troll), and the reviews he linked to had factual errors or were based on literally twenty minutes play. Several DC fans went to voice their frustrations over on the forums and naturally found themselves unable to post their thoughts/opinions/rants.
So yeah long story short - it at least *was* the case that dissenting opinions weren't tolerated.
If I may plug my own blog as I only need two more views to push me up to the 100 views in 24 hours mark -
http://kimimisblog.blogspot.co.uk/I look at the more obscure side of imports for all sorts of systems, probably something in there for everyone if you have a rummage around
(If self promotion is not OK, please feel free to delete that part of my post - and "Sorry!")