O&S(meme) - why do YOU drop litter ?

Littering of public / natural spaces / ancient monuments really annoys me.
You just hiked this beautiful beach / wood/ valley / hill carrying all that food and water, so why is it so much trouble to carry down the now empty packets and bottles, especially as they'll weigh a lot less / take up a smaller space in your rucksack ?
[I do spend time on the public footpath / access land near my home, and frequently return home with other people's litter [some of which can be recycled, before the local wildlife & farm animals can be injured].
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not my image : fair use & public education