From that article:
"Amazon managers found that an employee who happened to work in France had filled out a field incorrectly and more than 50,000 items got flipped over to be flagged as "adult," the source said. (Technically, the flag for adult content was flipped from 'false' to 'true.')"
Oh yeah real technical.
The problem is, without more information, I do not believe a word of that. Filled in a form incorrectly? What form do they have that does that kind of thing? And how can an employee in France cause some kind of cascading re-categorisation of data in the USA?
That explanation sounds like total BS to me. For now, the trolling/CSRF explanation is more likely, IMO. The "troll" has given specific technical details, all of which at least pass the smell test. Amazon's explanation - a foreign employee filling in forms wrong - is just too cute.
Now if you'll excuse me I need to order more tinfoil hats on Amazon ....