Amazon has subcontracted a lot of its deliveries to "separate" companies, to thwart holding it accountable.

The workers at one of them now demand Amazon negotiate, but Amazon wants to shut down that subcompany instead.

The easiest way to hold Amazon responsible. Don't buy from there, and ask your friends not to buy anything for you from there. Inform web sites that ask people to buy from Amazon through their pages that you boycott Amazon and suggest they choose another way to raise funds.

I go even further than this. I refuse to identify myself when buying products, aside from prescription medicines.