As a moderator on one site, it is kind of important that my chat account is associated with the site on which I am a moderator. Several times recently I've been booted out of the Teachers Lounge and other moderator only rooms, only to find my chat account has mysteriously changed parents.
I've finally made the connection that this is happening because I used the "automatically move this discussion to chat" link from comment threads on another site. Following these links seems to auto re-parent your chat account.
This is an unwanted side affect for me. If there is actually a justification for having this function, can an option be added for disabling it? My chat account parent is fine the way it is thank you :)