It's to discourage anyone else from doing the same thing as anyone could do it if they don't plan on being a Staff Member again. With this punishment, Staff really have to weigh their options and consider the fact that they will not be able to play on our Servers again should they choose to do something incredibly stupid. Getting a Staff position in xG should mean something and should be something to be proud of; none of that would matter if people think players who abuse their position as Staff get a free pass to play on the Servers. In other words, what's to stop a Staff Member from slaying everyone if they know that the worst that could happen is they will be demoted? They would otherwise still be able to play on Servers, and more often than not, these abusers only consider one thing: to go out with a bang. I say that if that's what they want, then they damn well better accept what's coming.
It's one thing for a player/Member to mass free-kill people; but it's a whole other thing entirely to betray the trust of the Higher-Ups who gave you (the abuser) the opportunity to moderate on our Servers by practically spitting on everything and writing it off as nothing more than a joke. That being said, while it's commendable to see someone own up to their mistakes, I personally don't think those who intentionally abuse to get a laugh out of it [because they're pretty well leaving the community] should be unbanned from the Server(s). If this Ban Protest is honestly being considered by the Higher-Ups, the only thing I'd like to point out is that this will open the gates for any other past-abusers to protest their Ban and to receive fair judgement on their part too (assuming this hasn't already occurred).