> I'm not sure how much clearer you could mark that.
It's not about this warning. It's about that it's the only warning. From the intro and from discussion here on HN, I imply author knows about other shortcuts made for the sake of simplicity/explanation/readability - I just wished those shortcuts were pointed at more directly in the article, instead of blanket disclaimer.
The doc string for the hash function states:
I'm not sure how much clearer you could mark that.The point in the article seems to be understanding the blockchain protocol and concepts and not "how to write secure crypto."