Beginner to pro in a few rounds ?  please take a look at this guy 

http://battlelog.battlefield.com/bf4/battlereport/show/1/1066542902435981440/1774709955/

Either he installed some hacks after getting tired of having a lifetime 0.85 K/D, or he gave up and handed his account to someone else to play.  But yeah, the person playing now bears no resemblance to his former self over the last 3 or 4 games with high headshots averaging 3x the K/D. 

http://prntscr.com/lmnnp6

May not be enough to ban him yet, but it was enough to make me come check on him.

LOL.  He stepped it up a bit.  http://battlelog.battlefield.com/bf4/battlereport/show/1/1066599490819532928/1774709955/

Boom!  Slam dunk rage hack.  292:21, 230HS.