If you are so out of control from distraction that you can’t restrain yourself from tossing a potentially dangerous object the direction of another person (the example given by allmendream was a coffee, and everyone knows the danger of McD’s coffee!), please stay at home or separate from your child in public until you can learn to overcome endangering others.
I’m very supportive of parents of, and caregivers for, persons with autism, but the condition doesn’t provide an excuse to endanger others.
I meant to ping you to my reply, but goofed and left you off. Sorry.