Stopped at a motorway services and as we came out a little girl 9 ish took the wrapper off a muffin and dropped on the ground about a metre from a bin.
I said excuse me, perhaps you could put that in the bin? Quite politely with a smile.
Young girl went to do exactly that whereupon her mother grabbed the wrapper and flung it back on the ground shouting at me “don’t tell my child what to do!”
How would you have reacted?