This actually looks a lot like the product of someone asking several "tech savvy" friends what skills a web developer would need, and then pasting the results into a job announcement.

This practice isn't limited to small shops either - I've seen multi-billion dollar companies (not in the tech sector) require a 4 year CS degree for a Wordpress developer position.

I literally can't image the person, tech savvy or not, who would come up with DrRacket here. Or prolog.

I agree with GP that its' just blind googling.

This would also be a great way to warn other devs off of the company (note that the sites are given).

I actually tried a couple of searches based on your comment and I really didn't get anything that wouldn't taken quite a bit of effort to piece together into this listing.

"what does an expert web programmer know" "what does it take to be a web programmer" "what do I need to know to be a web programmer"

This might be a warning written by someone who is leaving. In other words, with a less-than-friendly parting of ways, his/her final task was to write a job description to hire a replacement. If so, well played.

That's a really interesting theory. Improbable, but I like it.

[i pray] it is. Many of the technologies listed solve the same problems, yet knowledge of "all" is a "must". I've seen some mixed stacks, but never the Java, Scheme, ASP, PHP, C++ one.