Well at least he's asking before a 'date' is confirmed. There are too many johns trying to coerce sps into bbfs once they're in a room with them. Actually, there are even some sps whom i've heard have welcomed it. Guess it helps some people if they're handsome-looking men.
I mean, what if it's indeed true that the guy has a serious allergy to latex & can't wear condoms? I know many women & men who have this allergy. So what's he to do if he's speaking the truth? Call the sp anyway & hope for the best? Like i said, at least he's upfront about it & if all the girls he contacted refuse to see him, it's entirely possible that he'll go away.
Personally speaking, i don't think that email is such a big deal & i don't really know why Nadya bothered to make it public. It's a personal issue & if someone's offended by it, all they have to do is ignore it & send it to the recycle bin.