vanilla
I can understand you not wanting to work on demo or soldier, so you snipe if scout is full. It's the people that go to DM servers for the sole purpose of playing sniper. And I think you just said it yourself why sniper is dumb, "You gain nothing out of the easy kill and the sniper isn't gaining anything by being constantly bombed." It's a lose-lose situation, so why would anyone go sniper in DM?
you snipe in dm to get good at the high pressure in your face shots, its not a hard concept