I don't think any reasonable person is putting down people that shoot magnums. What I DO see reasonable people railing against are the guys that think that a magnum is going to take the place of hunting ability, practice and good marksmanship.
Something I have seen a lot of, is the guy that buys a magnum, shoots a half box of shells at 100 yards a year, then thinks he is going to kill deer and elk and 600 yards. To shoot a magnum well requires a fair amount of practice. The higher cost and greater recoil of the magnums often cause people to shoot less, not more.

Royce