As Wings said. For the most part, especially if it may create a dangerous situation, others will speak out and correct an innacurate post.
Alot of questions asked and answered don't have a cut in stone answer and are more a matter of opinion. what prop should I use, what engine, what's the best trainer, ect....
I certainly agree an instructor is by far the way to go and his advice should be listened to first and foremost.
That said there are, Sadly, many beginners that come on here that will not get an instructor and this is one of the few resources that they can rely on.
I do challenge the original poster to point out a couple of examples of where the "the poster is completely wrong in his opinions" that may create any real problems and was not corrected by others.
I personally think this forum does a great job of self policing.