For all those snipers out there, if you shoot someone or something, move straight away after the shot, dont camp and snipe, it'll only get you killed!
E.g. - Backstab, hiding in a building with a sniper near the main bridge, you take a shot, you take another shot (same guy) third time round, he comes up behind you! theres the hopes of your medal, scattered across the wall.
E.g.2 - Backstab, hiding in a building with a sniper near the main bridge, you take a shot, YOU RUN! out of that building, and as far away as you can without being noticed, then take another shot, etc.... then come your medal, for so many kills without dying, so many sniper kills, etc...