You crouch to avoid being hit, not act like a bunny.
You can't jump while crouching, it is impossible.
Real snipers don't sit up in trees or sit in towers, they lay on the ground.
If you don't contribute, you are out.
If you sit out, you are out.
Another thing I hate is when people switch teams and find someone then switch back and kill them.
Or maybe, spam rockets into spawn rooms, or bases.
Tip: The worlds best sniper, will only take 1 shot from 1 position, after that shot. He sneaks off to another spot and takes his shot, and so on.