So company manufacturing it can make more money with monopoly. Also it had military relevance, if your enemies copy this shit … yout get air-raided. The family holding secret knowledge on this was “Weinling”. Later germans found out on this smh and knitted them in a 7 layer pattern.

The method of preparing and making gas-tight joins in the skins was known only to a family called Weinling, from the Alsatia London area. The sheets were joined together and folded into impermeable layers

Also German-empire had no access to colonies that produced rubber or cotton during ww1. So they used cow gut as a rubber-balloon replacement.

Layers where sewn in secret alternating patterns to make it airtight.

okay I will only torrent .txt ascii-encoded files then and open them in nano, this will make me totally secure.

… And open all other files I download in a sandboxed-environment

I think it is okay, when otherwise this would be just a bland text-only post, and the image is small/ not attention grabbing.

movies, music and pdfs/ebooks should be “okay” to pirate though, since they are more read than executable programs, right …