should i clean up after myself at a fast food restaurant ... - what can you use to clean dish racks in restaurants

I just went to BK with the kids and when we were done I got up and filled the soda again and went to my car.
My daughter wanted to clean the table, but I pointed out two or three people walking around in BK uniforms and said I didn't want to take their job away.
She's not happy, and I don't care.
A dozen years ago, a McDonald's worker was aggressive and followed me and my friend in the car and asked us to come back and clean up our mess.
We laughed so badly that we almost fell.
IMHO most people are limited by fast food joints to clean up after themselves.
Another reason why I don't do this is. . . . . .
If I go to an expensive place, I will not clean it myself, so why should I clean it at a fast food restaurant.
Did I set a bad example for my child? ? ?
Or am I helping with the job? All The Best! !