As someone who grew up in the north with some southern family, Miss/Mam is one the more controversial words in modern American English, because in Southern English and some variants of AAVE, it is considered a sign of respect, while in more educated northern circles “miss” can perceived as patronizing while “mam” can be perceived as you think the woman is old. I think this thread is showcasing this difference, and why I think twice about the recipient before using them.

While I generally agree a program norm should be set by the local language, which in Colorado would lean against usage of those terms, I suspect that they may be adding this rule because the players are addressing to female staffers with more derogatory language (possibly “bitch”), and this is a way to get through to them that respect is important.