It is good to tip waitresses.
Cam is eating at a restaurant and is getting bad service from the waitress.
Cam wants the waitress to know that she was unhappy with the service.
Cam leaves a tip, but tells the waitress that her service was subpar.
Cam leaves a nasty note on the table for the waitress.
The waitress was more attentive the next time that Cam went to the restaurant.
The waitress recognizes Cam the next time she is in the restaurant and spills water on her.