That being said, I think there should be some sort of asterisk attached. Once the divorce is final, the name needs to revert back.
IIRC, this is actually a pain to do. Knew a woman who just didn't want to pay hundreds of dollars for the paperwork.
My boss is actually married for the second time and still has her first husband's name. Like Mrs. Lady OldHubsName NewHubsName. She uses two because a) she owns a business and it was kind of necessary to use her old name at least for a while and b) she has kids with her ex-hubs' last name.
Still weirds me out though.