Amazon doesn't even take down products that give kids lead poisoning. If a foreign nation had imposed Amazon upon us, we'd consider it an act of war.

Sounds like it's a semi-legit area for blockchain applicability- a website/app which stores all reviews on blockchain so that people are 100% certain no one has tampered with them.

Step 2: Spam the blockchain with marketing, false stories, and smears against your competitors products. If the blockchain requires a fee to write to (most do), you win because you have a marketing budget and the average consumer does not.