To touch a disease-carrying pigeon is, for an adult, irresponsible. For a parent to allow a child to do so is neglectful in the extreme.
Pigeons are not "nice" and they are certainly not hungry. By feeding the creatures we are promoting year-round breeding, thus swelling the numbers of as seriously hazardous "flying rat".
In the interests of public health, pigeons in urban areas should be poisoned. There was a song about this, wasn't there?