Single parent families are not considered the ideal sort of family and kids might have it attributed to them in case of bad behavior or something else. Also, even if it's not their fault, single parents might hear that a bad behavior of a child is their fault for raising the kid alone.
Same sex parents might have a lot of trouble with super conservative people and it comes mostly because of their sexual orientation than anything else. Also, for the same reason as in the case before, not falling in the pattern family organization type, this family might suffer a lot with misdirected hate and accusations.