To be honest, the AI is pretty bad, I can't tell you how many archer took a shot at me and then moved to a higher position - in that order.
Shoving by enemy hasn't been as bad as I expected it would be, but it happens.
Duergar love it, both in the Forge and on the boat. Act III temple of Bhaal cultists when they do the weird test. Undead in Balthazar fight.
Worst thing is that there is effectively very little to do against it, since obvious defenses don't work. Even Fly offers zero protection. That the AI doesn't do it more often feels like the game being merciful.