That would be fairly difficult to get players, as resolution is not the only thing that controls the HUD size & position - there are several options/cvars that can change the HUD position and size. Most people customize their HUD to their liking, say for example like this:
http://i.imgur.com/7blJf0M.jpg
With that assumed, people would not only be forced to set their resolution to whatever you need AND reset their settings, which most people won't bother with just to play one gamemode.
__________________