mmn quoth thus:

"It seems that wherever one turns today it is impossible to avoid substitution of the plural "their" for the singular "his or her" when the antecedent is singular..."

There is a story of some magistrate in Britain, with apparently only a fuzzy grasp of grammar and political correctness, who said when passing sentence, "It is clear from the evidence that you felled your victim with a head-butt, and then kicked your victim in their testicles..."