I don't agree with breastfeeding past a year and most doctors DO NOT recommend it because of the social and teeth development issues it can cause but no, it's not illegal. No one can tell you when you have to stop breastfeeding. It's your individual right. I do think it's a little unfair for you to assume that the child was 5. He could have just been big for his age. The thing I would have been even more outraged about is the breastfeeding in public places and not even discreetly. That drives me crazy!