I consider myself to be the kind of person who can quite easily imagine myself in someone else's place. I don't know if I'm actually any better at it than the average person, but judging by the comment sections on social media and the conversations I've had with other people, I really struggle to get angry at strangers like many others do, even for things that anger is an appropriate reaction to.
This doesn't necessarily mean that I don't condemn their behavior, but that it doesn't provoke a particularly negative emotional reaction from me. I observe the world from a distance, and when I see someone acting differently, I generally can come up with a charitable story about why they act that way. While it doesn't usually justify the behavior, it at least helps me imagine why they're like that and reminds me that if I were in their shoes, I'd likely do the same thing.
This applies to cheating, violence, racism... Name a bad behavior, and I can come up with a story about what a person might be telling themselves to justify it. However, littering is something I simply cannot comprehend. I cannot wrap my mind around what a person is thinking when they're throwing trash on the ground for someone else to pick up. If it's something "minor" like a cigarette butt, then okay, I can somewhat understand, but tossing your McDonald's takeout bag onto the side of the road is completely psychopathic behavior to me. I don't think even the worst people in the world think of themselves as "bad" because they rationalize their behavior somehow. But if you throw trash into nature, you must know you're being a massive jerk.
Tl;dr: I want to hear the best justification for littering.
tl;dr I really don't get it either.
I really don't understand how people can do it. I moved to a developing nation in the Caribbean. Everyone's livelihood is connected to nature here. Reefs, especially. Yet every local I have met will casually toss their garbage. I went to a festival on the beach and most of the locals were burying their trash in the sand just enough to keep it from blowing away in the moment. Some don't even bother with that pretense. There were trash cans in easy strolling distance, every 50 feet.
The roads and waterways are stuffed with garbage here. I live on a canal that connects to the sea, and have watched tour guides and fishing expeditions tossing plastic bottles, polystyrene food containers and plastic bags overboard daily for two years. These are the same people protesting dredging their flats and cayes near the reef, but inexplicably and deliberately ignorant of their own impact.
Also interesting to observe is the speed at which the nation transitioned from class and aluminum drink containers to plastics. Mt first visit here was just three years ago, and most drinks were in bottles that were clearly recycled. Laser etch marks, rubbing from other bottles, etc. Now its all plastic. There's a national ban on single use plastics, but it isn't enforced, and it all ends up in the water and in the ground.
When I first witnessed the ghastly indifference of everyone here regarding proper disposal of garbage, I couldn't believe my eyes. It was like watching a bunch of five year-old kids, the way they shamelessly toss their trash to the wind.