It's the drop shooting I hate , it's used all the time on hcsd, I am sure people are programming there controllers to go into prone when they press a trigger button
Nah, it will be done by accident. I do it.
I switch the melee and crouch buttons because I find it easier to melee with B. The side effect being that in a gun battle you tend to grip the controller/press buttons harder and therefore accidentally crouch or go prone when firing.