Probably, though I hope in most Everett branches these people don't go further than that (instead of gene exorcisms or worse).

Well, unfortunately, as long as there exist such freaks, I wouldn't even be surprised — http://goo.gl/0X037F.
Depressed, yes, but not surprised.

I think the polite term for these people would "contemporarily challenged".

I myself would go for "atavistic" but then someone might get the impression that I'm not an all-inclusionary and sunshiney type of person who always assumes the best about people (e.g. that they are not allergic to peanuts).