A lot of people complain about amazon lacking a cap for spending everytime such a story appears. Invariably though everrytime i've read about something like this happening amazon dropped the bill if the usage was not intentional.

Honestly from what i've seen this policy of amazon's is really nice and if they did otherwise they'd constantly get a lot of bad pr. Cases like this probably happen often but not everyone writes about it. A lot more would write rant blog posts if amazon didn't drop such bills.