Beamur
I think this is probably the best and most insightful post on this thread for my money.
FWIW I'm not particularly bothered about what people choose to call themselves and I don't care what they call me (still technically married but divorcing and in a committed but non-cohabiting relationship with someone else). I can't get upset about it and if someone calls me Mrs I tend to let it go. I certainly wouldn't pull someone up for asking me my marital status over the hone.
But there's no way that if I did get married again I'd call myself Mrs.
It bothers me when people say "feminism is about choice" as a kind of lazy get-out-of-jail-free card, basically allowing them to revert to very un-feminist behaviour without further debate or scrutiny.
Well, yes and no: it is about choice but the "choices" don't happen in a vacuum and they reflect those arbitrary non-choices that patriarchy has provided us through history. So to simply default to the least feminist option of those choices without questioning it is bound to make some people question you.
So by all means call yourself Mrs if you want to. But be honest enough to admit this reflects a historical division into those who were "owned" by a man and those who no man had sought to own (or those in those days very rare few who chose not to be owned by a man).
Obviously its not like that any more, men don't legally "own" their wives and most marriages are much more equitable these days.
But waving it away and saying these symbolic categorisations don't matter at all is sort of avoiding the issue.