Re: Zip Bombs: 42KB becomes 4600 Terrabytes
Locking? It is encryption (although very weak, considering the password is "42"). Encrypted ZIP files use an encryption method called ZipCrypto (a proprietary format), whereas 7z files use AES. And it's only password-protected so that you don't download it, and have it immediately crash your AV software if it's set to scan all downloads. It allows you to download the file safely, and open it only when you want to.
The whole thing is so patently infantile, so foreign to reality, that to anyone with a friendly attitude to humanity it is painful to think that the great majority of mortals will never be able to rise above this view of life.