While I totally support bf, and understand that the WHO has stated that a baby should be exculsively bf until 24 months (sometimes not always possible), breastfeeding after this is just not right, espcially in a school age child, there is no need for it. I do understand that breastmilk has loads of benefits and this is part of the reason why many mums still bf, however could mums not express milk and put it in a sippy cup, or normal cup for the child, after all they are old enought to use one and would be using one anyway by this time.
Feeding off the breast is for babies only, and is really not right in an older child. I think that the mothers do not want to let go, and babify the child. Babies are weaned off the bottle and dummies by a certain age, the same goes for breasts too, its part of growing up and being independent. There are plenty of other ways of bonding with the child apart from bf.