I noticed while using the /vanish fakequit and /vanish fakejoin it sends the message, vanishes the players, removes them from lists, does all its supposed to, but it would be simple for any player to just press the list button and view everyone. Would it be possible to remove the player from the TAB list as well?

Players are removed from the tab list, for players who shouldn't see them. You'll see yourself on the list because you're not hidden from yourself.

Well... I feel dumb.