I thought this meant it would send an email to that address telling the user they've been banned, and explaining what happened and that an account cannot be un-banned. That'd be extraordinarily helpful, actually, given the amount of kids on this site who
1.) Have emails and internet access monitored by their parents and teachers.
2.) Don't know that they're banned or how banning works, and keep pestering the mods to give their account back.
You get banned, the moderators provide the reason for getting banned, and the site sends you an automatic email saying something along the lines of,
"Hah, your dusty ass has been banned by: [MOD] for the following reason(s): [BEING A SHIT]. This cannot be undone. You are beyond help. Do not come back until you've well and truly learned how to stop doing that thing."