My daughter only had two ginger kids in her primary school class (one girl one boy) - it was never an issue at all at primary school, of course it was commented on at high school but the worst the boy got was being called "Ed Sheeran" (which IMO is hugely offensive but nothing to do with the colour of his hair). The girl didn't get any ginger-abuse at all until she decided to cut her hair short... ... then she got "Ron Weasley"
. I hate to say it though ... .. ... ... she does look a little bit like Rupert Grint circa Prisoner of Azkaban...
Anyway, that's the worst of it so I guess things must be improving, either that or I went to a particularly harsh school, because ginger kids took some serious flak at my high school.