> This letter of authorization is also the first instance of where learning about how the Internet actually works gets a little weird. That letter is literally all it took for me to take control of a sub-block of someone else's public address space and get it routed to my network instead of theirs. Some of my network peers later asked for me to provide this LoA when we were setting up my network links, but that means I just sent them a PDF scan of a letter with my friend's signature on it. And I mean an actual signature; not some kind of fancy cryptographic signature, but literally a blue s…