I am not sure why people are so up in arms about being asked what title they use - for example on forms (to buy paperclips, or whatever). Given the fact that there are so many different titles people can and do prefer to use, surely asking your title on a form is not about finding out whether or not you are married - all it is doing is making sure that any correspondance etc is addressed to you by the title you prefer.
I'd rather be asked what title I prefer, so I can state my preference for Mrs, than have someone assume I am a Ms. And given the strength of feeling on here from the people who do wish to be called Ms, then surely it's better to check what title you prefer, and use the right one, than to make an assumption and offend you?
Of course, in the ideal world that some people want, Ms would be the only option, so it would not be neccessary to ask what title you want to use. Unless you had a doctorate. Or had been ennobled/held a hereditary title. Or were an ordained minister of the church. I am assuming you have no objection to people using these titles? It's just my freedom of choice you want to restrict.