Whenever I take a lunch to the park, I manage to take my trash with me when I leave. Sometimes there are containers nearby to drop it in. Usually there's less mass to carry out than what I was willing to haul in. My generosity toward the homeless is lessened by the fact that they have all day every day to clean up after themselves but just won't. Yeah, yeah, mental illness, busy panhandling or trying to survive - but if they can pack it in, they CAN pack it out.