Here we have Amazon taking the FTC to court over the fact that the FTC wants Amazon to prompt for passwords more often so as to prevent children from buying apps/IAP. That's actually pretty reasonable from the FTC (fines, etc. notwithstanding).
I know Apple has had to deal with this too, but take iOS 8 for example. Where Apple has gone over and above to create a system whereby parents get an approval notification on their device if their children want to buy something.
Why? Just think about where these companies are making their money. Apple from the devices themselves, Amazon from selling stuff. No wonder Amazon is fighting this, and Apple is just trying to make families want to be all Apple devices.