"Methinks thou dost protest too much." (Now there's some old-timey grammar for you, but it's relevant.)
Full dislosure, I have been a moderator at Antdude's forum for years, and the three other moderators and I have actually gotten him to tone down his approach to grammar and spelling (a little), so the ant and ant care information can shine through. But, it's not going to go away, since he started the forum and does almost everything necessary to maintain it, and it's important to him. Antdude's forum was the first and for several years the only successful online ant forum, and it could be said honestly that he personally had a lot to do with promoting the hobby, his personality qwerks notwithstanding. He has put a lot of time and his own money into maintaining his forum, warts and all. Summing up, AntDude is hardly trying to "destroy the hobby". That is a personal reaction to his grammar obsession, and we are aware this reaction is shared by others. I know he can really put people off with that behavior, but one can also look beyond it, and everyone now has the option of going to this or other forums.
PS - Grammar actually does matter, as it guides people to use a common, more easily understood way of expressing ideas. It's not a non-issue, but I think most agree that it shouldn't be as big an issue as AntDude makes it out to be, where it ends up as a derailing distraction more than helping people write better.