I believe it would be great to have a lobby where donators (i.e. VIP+). I think this would encourage more players to buy ranks and it would build on the community. It could also be a great way to show off your building skills and possibly become a builder on a player server. This lobby can get reset every week or so. All in all, I hardly believe that a donator would grief as it would lead to a ban and personally, I wouldn't want that. I just believe that it would make the lobby even more fun for some players.