Ben Coe from the Artist Farm always picks up his trash at the end of the concert. He believes that not littering belongs to all of us which is why he started The CleanConcert Pledge. It runs like this:
I will leave no trash on the ground at outdoor concerts and will encourage my friends and neighbors to do the same.
This sounds slightly classier than my pledge:
Pick yo shit up.
To take the Clean Concert pledge, head over to the official website and put your name on the board.