What you say feels right intuitively, but I can't figure out the logic behind it. Does participating in a marketplace automatically make one partially responsib

What you say feels right intuitively, but I can't figure out the logic behind it. Does participating in a marketplace automatically make one partially responsible for the crimes of others who participate in it? That doesn't seem quite right. There's a lot of violence in poor inner city areas, is it morally wrong to own a gun shop in such an area? Are we morally responsible for the actions of the corporations we buy from? What about our nation's foreign policy? To take an extreme example if you sell food to enough people, you know that eventually you'll feed a murderer. But intuitively there's a big difference between selling food and money laundering. I don't know. The Ross Ulbricht case doesn't really help. Ordering hits is morally wrong whatever the context, so that doesn't help in figuring out whether his other actions were wrong.