Yup,
Yahoo allowed owners to ban owners.
We had one of our colleagues literally go bananas and send "shouting" messages to us when we asked why he bugged a member the way he did, forcing her to leave.
The message to us were full of 30 font curses, etc.
Two of us had to coordinate removing him from more than one group and other secure access assets by telephone after actually making a script detailing what to do in order.
Otherwise he would have banned one or more of us while we were processing things if he got even a hint.
--
Bob Bellizzi
The Corneal Dystrophy Foundation