Not because it's "fun" means it's meant to be done. You have a weapon with a one-shot kill capabiliy, which can be used to take down enemies from afar AND up close. If you want up close one-shot kills then get a shotgun, but not a weapon that fits both rolls. *Flame shield engaged* And don't even get people here started about that, combined with the aim assist.
Do you know how hard it is to get a longshot medal with a sniper?
That's ironic seeing how they are weapons specifically designed for that. And still, no matter the circumstances, quickscoping should NOT be a mechanic in the game. Again, snipers should fill a long range role, and not an all-around role as they currently do.