Theymos can see edits in your bitcoin address field in your profile. So having an address set there, you are good. Also if you have mentioned your address in a reply somewhere, admins & globals could say if the comment was edited, and therefore see if your address was changed, (and as a result see your old address, and ask you to sign a message).

But I am only 95% sure that theymos can see edits in you bitcoin address field in your profile