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.

But what about the newbies? Don't you need to know someone then or you're just shut out?

Pigeons could only fly back to their place of origin. If things here worked the same as carrier pigeons, the only place I'd be able to send messages to was X. 😂

Somehow this wasn’t an issue for the age of carrier pigeon. They must’ve had existing comms and traded pigeons.