Neither have I. It's unnecessary, divisive and simply promotes antagonism.
In the same way, the ridiculous "Black Police Association" engenders division and promotes suspicion and disharmony. To say that such an association is acceptable because white people are permitted to join is flabbergasting. Why on earth would a white person want to join the "Black Police Association"? Would a “White Police Association” be acceptable because black people are told they are allowed to join? I think not.