Been saying this for a while now. Feedback I get is just "use training sg." Leave the room, go to inventory, equip two training sgs, go back to room, put your normal sgs back on when you leave the room because if you do, you might end up in an 8-person duel room, wait for your turn only to find out you're doing 0 dmg which means you have to leave the room again and equip your normal sgs and wait for your turn again.
All that when it can't possibly be hard to just have a /infinteammo command that will activate only in godmode training rooms. No event would be affected by this as far as I can tell. Hotshots might become annoying but nothing like the ignore player suggestion here couldn't deal with.