The problem I have with the class forums is that aside from a few people, a lot of the regulars post their opinion as fact. This is wrong because noobs grow up with that in mind and spread it to others and soon half the server is spreading disinformation. People like Grey and Churchill show up and try to set the record straight and then people attack them for telling the truth.
There's good information in many of these threads (such as Carraway's (ninja edit, got it mixed up with Brannigan for some unknown reason) Bard Guide) but you need to dig through them like a damn archaeologist to find the stuff that is true and the stuff that is totally false.
You see in end-game activities it's about respect. When I started doing Garuda or AV 16 minute runs I respected other people's time. What that means was that I was prepared for the content before I even went in. There is nothing more frustrating than doing something that is supposed to take 16-17 minutes then have people bumble along with 0 preparedness and it ends up taking 1 hour. In order to respect other people's time people need to be armed with the right gear choices for the right times beforehand and a knowledge of the content and your role in it. When misinformation is spread you end up having people come to content unprepared through no fault of their own which wastes everyone's time, even if they came in thinking they were prepared.
That's why information from high-end players is valuable. They've done the content and know what works and what doesn't. When I started doing high end activities I scoured the BG forums and other related forums for everything I needed to know and it helped me immensely. There is nothing worse than being the weak link and causing a wipe. So yes they do have a right to tell people flat out if their opinion is wrong.
So bottom line to everyone who wants to toot their own horn. Be 100% sure what you are saying is true before you pass it off as fact. If it isn't state that to be the case and ask for advice from the high end players. If it's an opinion frame it as such.