isn't there a difference between quickscoping and OHK? developers sometimes increase the accuracy of a gun by making you look through its scope, quickscoping is just getting the accuracy bonus while avoiding an extremely narrow field of view. if there is quickscoping, it doesn't mean that shots that are 100% accurate are OHK, does it?
You are right, but I guarantee that anyone asking for quickscoping will also complain if there are no OHK snipers. Quickscoping just isn't very practical once you start having to shoot people twice or more. But if someone still wanted to do it in that situation, it wouldn't be nearly as bad. Still not a fan, as it takes away the main disadvantage of snipers (CQC) while keeping the long range dominance they are made for.
P.S. would also like to add that neither realism, nor a total lack of realism are any fun. If, in order to snipe, you had to lay prone, focus your scope, keep your breathing and sway in check, adjust for wind, gravity, temperature, altitude, spin-drift, the rotation of the earth (on longer shots), and trigger pull, sniping would be far too tedious to be much fun for anyone.
On the other side of the scale, avoiding anything that actually happens in the real world makes something so foreign and strange that its impossible to relate to. Even in less extreme examples, I find that the less "realistic" a game tries to be (at least in the FPS genre) the more simple and boring it tends to get. You mention that Quake 3 had no recoil, and that it was fun. Well, at the time, Q3 was fun, but if I go back and try to play it, I'm sure that it will seem really basic compared to the games of today. Compromise and moderation is the way to go, as with most things.