The rubbish question

Lembongan island is a tiny island just a hop away from Bail - not more than an hour by ferry - but it feels like a different world. The few I've seen of Indonesia has already shown me that every island has a distinctively own character. And there a thousands of islands! Indonesia is definitely a country worth spending a lot of time.
Lembongan is mainly a beach island, very relaxed and slow-going. Until now, we haven't used the beach as much for swimming as for admiring the ocean and the ocean life - yesterday morning it has been raining, but with a very bright sky and the ocean had all colours from dark blue to bright turquoise. We spent hours on the beach enjoying the view and the special light. Furthermore, one of the main incomes on this island is seaweed farming, and the farmers go out to harvest bundles of the green seaweed on small boats which they maneuver with a long pole - a sight you could watch for hours. And than there's the possibility to go diving and snorkeling, which we are going to use today.
The stretch of beach where Tina and I are staying is, as most beaches in Asia are, strewn with rubbish. It is a pity to be detracted from the beauty of the nature by plastic bags, thongs and all kind of other garbage. The rubbish problem... I still cringe on the inside every time I see somebody using a plastic drinking bottle and, after emptying it, opening the bus window and throwing it out. Once I ordered a meal on a night train in India, and it came on a tray on several aluminum plates, plastic glass and all. After finishing, the trays were collected by the train staff, but not before throwing the leftovers together with the rubbish out of the window. How many meals are they selling and disposing of like this every day?
But then I know that the people in most of the countries I've been have different problems to think about than recycling. As how to keep themselves and their children healthy and alive until adulthood, or how to make enough money to be able to live in a house instead of a hut. For many, if not most of these people, a solid house with a real bathroom is still a luxury.
And than there's the question how I got here to see these "crimes against nature": Didn't I take a flight of 12, 13 hours? And did I think about the economical footprint that had compared with a plastic bag thrown on the beach? I did not much think about it.
I don't have a solution for this dilemma. I have not even yet found a point of view I'm really at ease with. At the moment, I just try to avoid rubbish as far as I can and find a balance between living eco-consciously and doing the things I want to, but at least acknowledging the impact they have.