I'm in DC and originally from the midwest and I've also never experienced that. I think it is simply a matter of respect. The first time, ok, she made a mistake, but it sounds as if you have told her that you don't like when she does that and she has continued to. As your close friend, even if she originally thought it was ok (which I don't think it is), once you told her to please stop...she should have.
It's not you, she's being disrespectful
, if she wanted to be able to throw up your sign and do your call, then she should have put in the hard work to get those rights. There is definitely a standard: put in the work to get the benefits, otherwise stop perpetrating.