It must be so hard for the parents having to cope with the general publics attitude towards their child. After all, they deserve to go out and enjoy life, like the rest of us, as do their parents and carers. But, like James, my main priority would be the safety of my animals, and in the heat of the moment, would probably say keep your child under control - which is not fair to the Mother, but like I said, when in that situation, you just say what comes into your head.
My neighbour is on a contract to taxi autistic children, and young adults to their school and adult centre. He told me the other day, that he feels he can no longer do it. He is being physically abused by the young adults, and he said he is concerned for the safety of the children, the helper with them and indeed his own safety. That day he was speaking to me, a young male had started to hit him round the head as he drove, and the helper with him was unable to restrain him. The driver had to find a safe place to pull over, the helper was in tears, and he was so frightened he would cause an accident.