> Do you seriously think that anyone would implement crypto based on a reddit post?

No. I think people may have taken it as a working example of encryption. Evidently it's not.

The post in question is also specifically replying to someone asking how Bob and Alice can tell a secret, without Eve knowing. The given example does not do that.

> Are you an idiot or do you think everyone else is? This is one of the worst posts I've ever...

Have you read: https://news.ycombinator.com/newsguidelines.html yet?