Is unfair on the child. It dangles in their face and gets in their way and must be really annoying for them. With girls you can clip it back or tie it up in pretty styles so no problem at all. It is the parents imposing their tastes and choices on the child - rather like when toddlers have pierced ears. Older boys with long hair absolutely fine - as they have chosen to wear it that way, but toddlers and younger boys no.