Carrier pigeons were immune to spam because you had to give someone a pigeon to enable them to message you.

This is about carrier pigeons and nothing else.

co founder of @metamask . Making computers behave for us.

Ohh damnn, never realised this is how they worked
Ofc only my pigeon knows the way to my house

20. hacking @ https://www.spire.dev/ 
previously intern Nethermind, epns.io

Yeah, sometimes called “homing pigeons” bc they fly home.

ok but now I suddenly want a refund on my order of homing missiles

TIL why worms armageddon has a homing pigeon joke