Despite popular belief It actually does take skill to snipe someone. In PVP your not fighting against AI's your fighting actual people who are actively moving not typical to any AI. I've used a sniper rifle in crucible and it's hard to get a clear shot of another guardian because, they jump in the air and almost immediately go back towards the ground on top of the enemy player who's actually smart enough to find cover..... seeing as how your obviously butthurt by the fact that you got sniped means that your not using your head in the crucible and finding cover to prevent you from dying from a head shot from a sniper