Posted by: VII Toast
It bans the person that you click it under.
For ex, if I clicked that under your name in my chapter, you'll become banned. Simple, really.
Also as a note, this can ban anyone in your group, even the chapters overlord. Be advised who you give it to!
Not entirely true. Only people with Full Control can ban other people with Full Control.
In any case, the ban lasts only for seven days and can be changed in Admin Tools.