[hughw]

It's hard to imagine a reason for it being kept... proprietary?

[bmenrigh]

A lot of people want to slap licenses on things without really thinking about what the license will do (or prevent), in practice.

I like the author's note about the license: "As we do not believe in imaginary property, this package belongs to the public domain."

I think it's much more common to see a Creative Commons license on this sort of thing.

[viraptor]

And even then, when people have good intentions they don't anyways know about edge cases. Please give things a licence in addition to placing it in public domain, because in some countries (like Australia) you can't release your rights that way.