A concern about the World Visit feature
Let's say you're doing an alliance raid with a particularly salty party member. As the lead of your team, you initiate the vote-kick and the salty party member is dismissed.
There's nothing to prevent them from finding out your character's name and world via the Contacts menu and then teleporting to you and just launching a torrent of rage at you. Of course, you can blacklist them, but that won't prevent them from following you around or generally making a scene in /say or /shout (not sure if blacklisting only mutes tells or everything).
You could report their behavior to a GM, but that doesn't always mean anything. My concern is that, as cool as this feature would be to visit friends, it might also create a hotbed for griefing. Your thoughts?