Anything I can do for a purposeful and malicious sniper?

I'm going to close this down. This has broken down into bickering.

OP: if you feel this is harassment, please do your best to document this behavior and report this to CG_SBCrumb.

On topic: This is a game with a battle mode. How someone chooses to play that mode, as long as they are not using any cheats, is not against the rules of the game, at least not that I am aware of.