It doesn't care about copyright or authorship, which becomes a huge problem due to content no longer having a real home in IPFS, everybody can pin, cache or share content on IPFS.
No it doesn't. Maybe in some places? But not in most. You can break copyright laws with pen and paper, which don't have any protection against it and are perfectly legal
I think that would go against the philosophy of ipfs. Sticking drm on top of it would crash with the intended self-archiving capabilities and censorship resistance, as well as with the whole point of a decentralized network since some entity or entities would have the power to block or delete content from it