Doc Kevorkian

I'm a noob learning Arma 3. I have just started playing Wasteland as my first multi-player involvement. There are players who seem too good at killing everyone else. What's to stop someone from coming on as Blufors, locating other Blufors players, then disconnecting, reconnecting as Opfors or Independent with another name, then going to where they know there is Blufors activity and collecting kills?