I'm completely shocked!

Last night, my girlfriend and I went out for Thai food.
Then a family came to the neighboring table.
One of the kids, a small boy around 16 or 17, was celebrating his birthday.
I was feeling happy for him, thinking he's so lucky to have family to celebrate with and cut the cake.
But after they finished the cake and left,
they left behind a table full of debris, which was already shocking enough.
What really blew my mind was that they didn't order anything...
They just drank four glasses of lemon water and left a table full of trash.
Amazing!