They could warn the next one IF or WHEN they do something wrong, they're not going to refuse them to play their event for something that happened in yours.
It's not exactly the same in the Help Desk AT ALL. The Help Desk is something that doesn't always need your attention, you have time to look at the banned list and if someone is in who shouldn't then you kick them. If that occurred in an event you'd have to look at the thread when in an event you should be doing rounds with your attention on top. Also, you'd need to check the list a lot if there were a few who were banned as like me and @
GoldenMerc; said it's far too easy to clone. The problem with the event is that it's only for an hour, the Help Desk is a continuous thing.