And blimey it worked!
Ds was policmanning the slide -yelling at kids whom he though were using it dangerously 'No, that's dangerous. You could have been killed' pmsl.
I am trying to watch dd (2) and am with a MN friend who has three kids, two of whom have ASDs anyway, and as I am leading ds away, a woman comes up to me in outrage telling me how ds has been scaring other kids and I just say, 'look sorry he's autistic' and she visibly recoiled, said, 'sorry' and sort of melted away. Result! Will be using that one more often, instead of 'oh fuck off and stop bothering me' which comes to mind even faster! (yes, I know they don't know yadayada but ds is an unusually small, chubby five year old who isn't about to knife anyone)