Kid should be banned permanently, doesnt matter what the reason behind it is.
To just stand there and calmly shoot that lad in the back like that shows a serious character flaw, airsoft doesnt need players like that.
Makes me think of that video from the mall when some nob shoots his own teammate for being in the way, cant find the link but sure someone else can.
As for high rof cant see the point anything over 25rps is just overkill.