[luatex] Hash tokens meaning

[Sensei]

On 5/29/13 1:25pm, Arthur Reutenauer wrote:
>> As I said multiple times: I've downloaded the TeX book, and I am reading it.
>
>    That's illegal.  Wherever you've downloaded it from, shouldn't have
> made it available.  Unfortunately Addison-Wesley doesn't provide the
> option to buy an electronic version (that I know of), you have to buy
> the paper copy.

So... CTAN is illegal?

http://www.ctan.org/pkg/texbook