NP here. I AM TIRED OF LAZY PARENTS WHO DO NOT DISCIPLINE THEIR CHILDREN. You play, you pay - don't just spit out kids and expect the rest of the world to handle them for you.
Sorry this happened OP. Next time, scare the sh*t out of the kid. He won't do it again, and his lazy mom won't even notice. If she does, she doesn't have a leg to stand on, as she should have stepped up WHEN it happened.
PUT DOWN THE CELL PHONE AND PARENT, PEOPLE.
Actually, she would have a leg to stand on. If she starts raging around like a lunatic, she could have security called to have her removed. If she touches the other child, the mother can press charges for assault.
You really have no idea what was going on here . . . would you really be happy if that mom flipped out at a special needs child? If you are going to flip out on anyone, flip out on the parent. Don't bully a special needs child, asshole.
It is not difficult to go to the child and say loudly "Is there a parent with this child?" and address your comments appropriately.