Yeah, but the problem is that it completely takes you out of the game. You might be putting them on the radar for your team, but you're also basically putting yourself in a penalty box and giving the other team a power play. Its really useful in s&d, but I think you're overall doing your team a disservice by taking a player off the field in any other game type.
Unless you're one of the guys that dies alot. Then, you might be doing the team a favor by sitting out.