Elevator asymmetry protection and limitation are all part of the hydro mechanical control mechanisms for 737, 757, and 767 aircraft.
Although rare, prior to taxi, it was possible for the DC-9 series to have a control column lockout caused by elevator asymmetry, due mainly to wind gusts, which could move one surface without the corresponding surface following thanks to the free-floating elevator tab design. This aircraft did not have elevator asymmetry protection, yet to the best of my knowledge, there have been no incidents or accidents relating to a failure in this regard.