There are some other ways to protect your privacy though. Or at least shore up, in a sense. Go check out this older post of mine (rather than me wall-o-text-ing stuff here more than I already have.)
Also, I don’t think I knew that they did that, with the guild chat. I wonder if it could be an add-on? I’ve bopped around between Moon Guard and Wyrmrest over the years, and I don’t think I’ve ever seen or even known that was a thing. I’m going to have to check that out now.