I don't see how this would be so much of an issue. If someone is stalking you, you should talk to a GM. If they ever get around to adding a search function they could just /sea you whenever they wanted, and most likely see which zone you are in as well. It would be nice if they had an invisible status though, where people couldn't /sea you and you wouldn't show up on friends list. Though, you might argue that an invisible status could be used as more of a stalker tool. Lol.