AFAIK they would get the info “which user said what”. The source would be what ever instance you are from tho, not your own ip. So the owner of a instance knows as much as everyone else.

I think they meant your info being sold on dark web markets, not your behaviour on the dark web being sold.

BMW did it: Video link

The 1949 geneva conventions have been rattified by (afaik exclusively): all UN members, palestine, the holy see and the cook islands. The singning binds the signee to uphold these rules for themselves. How then could the UN, who as you said is “just an extension of its member states”, not follow the morals you yourself held as the absolute standard?