I tend to agree with everyone else...it's not really unethical...if you post something on a public forum, then it's out there for anyone to read, T or not. I do think that it might not be in a client's best interest for a T to go hunting for the things they have posted online and reading those things...unless the client specifically asks the T to do so.

There is a reason, though, that my user name here is not even remotely close to my own name, and that I haven't listed even my state in my location. If my T were really reading through posts, she could probably identify me...and I wouldn't mind all that much if she did...but I'm pretty sure she has better things to do.