What would you do if you saw kids acting inappropriately in a fast food place, where they might be hurt?

Yesterday evening I was at Wendy’s, on line to order. The cashier seemed to be new, because he was taking a long time with this woman’s order. While the woman was ordering, her two sons were playing by the condiment area, where people go when they come off the line. One son was about 12, the other was about 9. The young one was taking running leaps and jumping on the old one, and the old one was tossing him around.

The mother (I assume it was mother and sons, or just for the sake of the story) was not paying attention, as she was dealing with the cashier. The area the boys were playing in was an area where they could have collided with someone coming off the line, and perhaps gotten burned or caused a spill. The worker that cleans the tables was giving them the evil eye but they were not paying attention.

I did nothing. What would you have done? Told management? Pointed out to the mom that her kids were in a high-traffic area and maybe needed attention? Told the kids yourself to be careful or they might get burned? Or done nothing like I did?