The flip side to this is I've on multiple occasions had Amazon ship me clearly used shit resold as new — Amazon.com was the seller.
One even came with a sticker: "Thanks for giving this product a second life!"
The worst of the worst among us use Amazon as a try-before-you-buy or rental house. Their lax return policy encourages them.
If I buy anything important, especially expensive electronics, I buy it from somewhere else. If it's a reputable store with a strict return policy, I'm doubly sure there will be no fuckery.
I remember why most of the stuff on the frys shelf was like this. I think it was their downfall and for me i stopped shopping there because of all the broken items. With Amazon at least I don't have a huge cost to drive there and back.
Returns are monitored and you will be restricted if it looks like you're abusing the return policy
This happens with items where it's clear no human even glanced at it. I received a sump pump that was wet and dirty!