Some people have been idiots, just really FRICKING handicapped no matter what we tell them. If they ask for admin, and we tell them not to, they'll ignore us.
From there, I see two groups of people: the people that eventually change (General Omega was hated before, he's a good guy now) and the people that leave because we're "being mean to them" (LewnaJa, etc).
Kicking or banning PURELY BASED ON ID is pretty stupid. They're new; so what? Hell, banning for messing with emitters/vehicles should be considered stupid, too. How many of us remember back when we did the exact same thing?