SN

it will be interesting disgusting to see how much has piled up since 2000 when I go back there this fall.

About time they we did it.

It has been done elsewhere. When I was on Aconcagua in 1998, our team of two was given a big burlap farm bag each at the Park entrance. After our descent, we had to show the bag AND they weighed it. - if not full of trash, then a big fine. I think it may have been $200. We were told it had been a highly simple yet highly successful program.

On the flip side, the demands are different. Compare these two peaks and their respective 2 week vs 6 week trash loads:
A : 20 mile walk from 8,000 to 14,000 ft basecamp, then 22,800 ft summit. No O2 bottles needed (hah!) or piling up.
E: much longer walk in, and higher basecamp. much more of a "pyramid" of people and supplies for support , not even considering the O2 bottles, dead bodies, the kitchen sink, and other stuff frozen in place.

I say this not to defend leaving trash, but just to point out the additional difficulty. Clean up must start.
Here is a respected Everest chronicler's blog on some of the problems:
Nepal cleanup 2014