Ive known this bug for a long time but i dont know if its been suggested, when someone has admin to a server they can shut it down from inside...and ive seen people abuse this cmd and shutting down the server for everyone by going /cmd disconnect i dont know if this has been suggested but oh well :P.

Not sure you can call that a bug, sounds more like a newbie (or n00b) admin doing it by accident. If a server admin does it out of badness, then vote with your feet and don't play on their server again.

Well the thing is, it would be nicer if there was a way that only 1 person would have this option instead of everyone, because than the server will crash because other people that have admin.