After a festival

Leeds and Reading festival in the U.K 1000s of festival goers were lazy bastards and couldn't be bothered to take their tents and other rubbish with them

Well if there are 0 places to put trash then that's terrible event planning. They still should just stick all their trash in their car or wherever and take it with them to make up for terrible event management, but if this scene really needs to be avoided they just need to give people a quick and convenient place to put their trash. Most people Will choose a yeah can over the ground if the yeah is close enough