I don't take as much issue with price match failures. If Sears was actually selling the system at that low price (even if it was a mistake), they were still selling it. Individually, people could have moral issues with this. But I don't take as much issue, if Sears was selling this to people at that price. Wal Mart chooses to price match what other companies are doing. So, it's just an effect of their system.
But, I take issue with this, because this guy was scamming innocent people using a really shady tactic. And then people turn around and use his scam, to scam these companies. At least to me, it makes you no different then the scammer. Sears was an actual sale, this wasn't. It was a falsified identity to trick people, and people sued the same thing at Wal Mart.