Example: SD8 wanted to get her hair cut. DH (not me!) took her for a trim (about 1-2inches of very split ends were taken off) and it caused a really big issue (2 weeks of phone calls and emails), because thier mom (in her words) "wants her little girls to have long hair" and she "didn't care if SD8 wanted to get her hair cut" and that stuff was her descision to make. To this day (almost 2 years later) every time I brush their hair, or make a comment (and not a passive agressive one) about how long thier hair is (a complimentary one!) they say "we're not allowed to get our hair cut". I have a feeling that SD got in trouble for the whole incident by something that she said a while back.
Its harmless really, and as they get older there will be more of it. You kinda have to learn what to tune out a bit and what to be concerned about.