Really there are plenty of forums about WoW where no one will care about how you're writing or what you're writing, instead of making a big fuss about it why not just go there? It's their forums, they run it how they want to, if you don't like it, get out. Does an entire guild who have nothing to do with you need to change their policies because you happen to disagree?
I also think that grammar and the like have absolutly nothing to do with actually having a brain (being a physicist kind of does that to you

). But kind of like the GRE's, even if they don't measure actually being any good at least they measure some sort of effort. And so I'm willing to put up with having to double-check my writing so that I can read things that are for the most part useful and informative instead of inane drivel.