I find it disturbing if they just put a cap on the fire rate. I don't use modded controllers, and rarely use single shot guns, but I know people who can shoot these single shot guns fast, by using SKILL. What IW should have done is put an algorithm in to count the distance between shots, and if like 5 shots are fired in exactly the same frequency, then kick the person out or don't let them fire for 20 seconds. Turbo controllers always use the same frequency, whereas humans with skill can still shoot fast, yet there will always be a few milliseconds difference between shot fire times.
Everyone who doesn't like it has a mod...simple as that.