Surely the David Moyes comments indicates a level of reverse discrimination.  He made the 'slap' comment then after a short delay added the comment, "even though you are a woman", which to me suggests that he treats the genders at least equally and in most circumstances females with an even higher level of respect than males.

Shouldn't we be examining the threat of violence rather than who it is directed at, (that was gender neutral).  In the circumstances that the 'threat' was made though it appears to have been made in a lighthearted manner.