My suggestion is have fun with it. There's a number of ways to screw with people - carrying a second small AEG and firing it to simulate more than one shooter, shouting at imaginary friends, throwing rocks to simulate movement where you aren't, putting your hat on a stick and making them shoot it, what have you, just make them waste far more ammo and time on you than is worth it. It works great in fields like Silverton and Scappoose where there's lots of cover, not so much in places like SniperzDen.
I highly suggest it if you have the running stamina. It's a lot of fun.