some kind of hack?

auto-banned on our server with 14 kpm per min with weapon Death on Metro.

Cannot find that specific battlereport but check out those three:

http://battlelog.battlefield.com/bf4/battlereport/show/1/889806689482638656/351963024/

http://battlelog.battlefield.com/bf4/battlereport/show/1/889811392866054592/351963024/

http://battlelog.battlefield.com/bf4/battlereport/show/1/889794174564507328/351963024/

get a hell of kills with no weapon?