I'm kind of the other way. I'm so aware of what I don't know, that I hide some subsections of some forums simply because I either can't contribute or don't have an interest. I've owned a 'B' and my current 'C', but no 'A' or any form of TT or 5er, so I hide those sections. I also hide the Mexico forum because of no interest. I've also jumped in uninvited when someone is planning to do something dangerous, like driving from NY to CA in two days. Or when a fellow flatlander isn't familiar with mountain driving in the western states. I can't contribute to boondocking threads because I'm a FHU guy. I read the Canada/Alaska forum, but I've only been in BC, AB. and Alaska and I'll contribute there if I can.
And I refer lots of people to "Weatherbase". Some eastern folks don't know the effect that a higher altitude has on the mountain west, like Yellowstone. Or how big YNP is, figuring on seeing it in a couple of days.
Beyond that, I'll suggest some things to see that I kind of tripped over, but really enjoyed. As in "If you have time while you're in the area, be sure to see...".