In a wide-ranging article on trans issues. Piers Morgan states he is happy to 'respect a trans person's right to be called by their preferred pronoun' (although later in the article when referring to a transwoman murderer he puts 'she' in inverted commas).
I'd argue that pronouns aren't something you can pick and choose - they are a function of language designed to refer to the sex of the person in question.
I'd also argue (as others have done more eloquently) that the 'be polite/what harm can it do' approach of using cross-sex pronouns is significantly hampering progress in reclaiming women's rights.
So Piers, if you are reading...