Rolled a set of Alliance toons recently and made a discovery which annoyed me greatly: If a Gnome is following a human (not tried with other mains) into the water then the Gnome will drown.

I know there's a lot of people who'd approve of Gnome drowning but having characters not only stop following but just randomly die isn't fun. I ended up lining up the entire lot on the beach, move backwards to remove follow, then hit Autorun on each char and 'Follow Main' when they hit the other side.