What threat model includes “malicious actor can see my taste in music”?

Can you watch my ads for me?

Have I misunderstood federation or doesn’t it seem a little generous to call anything that can be hosted by yourself federated?

I had no idea IRC channels could live on multiple servers. That’s cool

The history of federated services is really fascinating:. IRC, FTP, HTTP, and SMTP were all created in the early days of the internet

Except SMTP in a roundabout way, I don’t understand how those are considered federated?