No, not at all; you can see those guys! Lost out on many a sniper/scout fight with them mind you! There are those that can just aim and shoot before you know they're there! I was killed by one guy before I had even finished aiming my weapon! Just a flash of a red dot and death!

He's what are called one of those moving hard scopers, he reads the radar, see you coming, aims at head hight and strafe in and out of cover, he was waiting for you!