Admins please note the power! I did some testing, but it was not thorough. Things are looking good so far. I'm not 100% sure how pages will display when for a BotBr with one or more of these statuses, but they do cripple the user experience each in their own way.
troll - vote forms are not generated; votes are not saved
zombi - comment boxes hidden; posts are not saved; new threads are not saved
mummi - treated as a Guest in many, many cases; can not do much of anything
Admins == I know the icons are cute, but this is not a toy!