Yeah I'm not sure what the point about the moon waste is considering it's likely inside the remainins of lunar landers. The real space junk to worry about is all the stuff in LEO that will cause problems with satellites and such in the near future

I always try to think of these things at their greater extreme left unchecked, in order to evaluate if it's worth caring about. How about when there are so many bags and abandoned transport equipment that it starts to become harder to land safely? What if we finally start to have a base on there, and the trash becomes unsightly and a nuisance?

Stuff ars publishes from other sources (especially wired) usually isn't worth reading.

Unforgiven, the anti-space argument is always the same. "Let's focus on earth first" Earth is always going to have problems, this mindset gets us nowhere. It's not like the people thinking about the space poop problem would all be hard at work solving earth poop problems if they weren't allowed to think about space waste. These things are so incredibly not mutually exclusive. Furthermore, it's entirely possible that some out of box thinking about how to manage moon waste ends up making for a creative solution for earth waste management that has a huge impact. Perhaps we need little packets of genetically modified yeast placed in moon poop bags to eat up the waste, and it turns out that putting that in Portapotties helps with odor, decontamination and insect burden. Who knows. It's never too soon to seriously start thinking about space problems.