On the other hand, they've made me care more about counterfeit goods. I've received a few this year already. What's scary is that on some health items - like vitamins - if you're ordering for the first time, how would you even know what the real thing is supposed to look like?
I now try to order items directly from the manufacturer or authorized distributor whenever possible, simply to avoid counterfeit risk. Kohl's for clothing and LifeExtension for vitamins. Ironically I have more faith in these retailers because their traditional single-source supply chains are less efficient than Amazon's crowd-sourced/FBA model. Less efficient and therefore more trustworthy. Maybe this is one of the few ways David can beat Goliath.
There also seems to be broader opportunities in this area around supply chain integrity that's transparent to and verifiable by end consumers.