My summary of their post is "we basically have no idea how to offer a reliable service and we know almost nothing about basic Internet protocols, and we feel like heroes anyway".
I would be a lot more impressed if they were asking questions about how DNS really works and what they should do to avoid problems in the future. That would be cool.
Sounds to me like they learned a lot, and are sharing what they've learned to help others. What's really to gain from shaming them over it?