I think you should definitely bring it up with your T. I don't think this is an unusual response and you should not feel ashamed. Your t puts this stuff online to be read. Who is more likely to read it than his own clients? I'm surprised he doesn't use a pseudonym in order to avoid this kind of thing, especially since he interacts with other (non paying) people online. My pdoc has some online presence in research articles and blogging, but it's clinical in nature. If he were online in a more casual way it would bother me too.