It would be interesting to hear Amazon's side of the story. It just doesn't seem like something any digital retailer would do.
Assuming Lynn did no wrong and this is entirely a fraud algorithm problem on Amazon's side, you would think there is a higher authority within Amazon to dispute the problem. It's a shame they they didn't offer her anything in terms of dispute resolution or fraud prevention.
I'm going to email Amazon's feedback link as chanux did, I hope the larger HN community does the same.