I remind people CONSTANTLY that it takes 2 to perform the HO. Also, if a player turns into an attack and is the "second piece" of the HO, meaning that his turning into the attack made the HO situation possible, he dare not complain he was "HO'd". I see and hear that quite a bit too.
It is a valid tactic. It is just too bad it is the knee jerk tactic that it is.