I haven't read all of the posts - some are brilliant!! (I have read those, of course) but I agree with the French - on official forms, why not just a title to say if you are male or female, ie Mr or Ms (or Madam, which used to be the common term used). In some Asian countries, the women keep their maiden names officially even when married, so you're still Madam Smith even if you've married Mr Jones, and it's not a feminist move, it's just the way it is, and also a way of being able to get access quickly to a person's records from birth to adulthood to death, without wondering if she has changed to a married name.
Incidentally, I noticed that when I visited France, I was automatically called Mademoiselle when under the age of about 35, and it switched to Madame when I was in my late thirties, regardless of whether they knew I was married or not (they continued to call me Mademoiselle in the shops even when my wedding ring was in plain view.) Not sure whether that is better than being defined by marital status! But yes, I would be happy to have just one possible official title per person on forms, and also to do away with Dr, Professor, Sir, Dame, Reverend, etc. It's not a tea party, you're just doing your taxes or going through the airport!