Copyright ought to be rethought, now that computers and networks exist. Back when not anyone could make copies of books, it was reasonable to assume that if you were making copies, you were depriving the author of potential income.
I see this so often and it's so wrong. That if you know GNU/Linux, you must switch to Arch, Gentoo, Fedora, OpenSUSE or at least Debian. That if you use Mint or Ubuntu, you're not a real GNU/Linux user.
Linux isn't very Unix-like by itself. Of course, it's a Unix-like kernel, and it does Unix-compatible file operations, process management, and system calls, but without the GNU suite or some other userland, it is just a kernel which doesn't have to be used as a Unix-like one.