It's all over the news today and of course a man shouldn't be able to hold a women's record or win a women's race, but in an amateur event, organised by volunteers (like parkrun or the smalll trail race my club organised last night) how do you avoid it? We don't ask anyone to prove their sex, if someone who was quite obviously male, with a male name, male clothes and a beard said he was female on the form (deliberately or by mistake) that's what the record would show. Probably no one would even notice.
I understand the disquiet about it, but what do people think can be done?