It's probably best to bust bunkers with your team while you send maybe one or two people out to "snipe." This way, your team can advance or hold the middle (hopefully) while a sniper takes a couple opponents out.
i mean ur sitting behind a bunker u POP UP and shoot at some one chancer are there going to notice 10 balls coming at them
By the way, this is very important: you shoot AROUND the bunkers. Never shoot over the top, do not stand up and shoot over the top, do not stick your marker up and shoot over the top, because you just made sure that the opposing team knows that you are there. Like I said, learn to shoot AROUND the bunkers. It's so much easier and faster to pull yourself in from one of the sides than it is to drop down.
It will take a little while to learn, but it's definitely a very important tactic worth learning. You might also want to try shooting with your off hand so you can play either side of the bunker.
Remember, AROUND the bunker....
"If you shoot, they'll probably run or get pissed off and bunker you."