TLDR: While Fediverse won't directly serve you ads, anonymous bad actors other than Meta can save, redistribute, and even dox you for any information you post here. Anything you post here can/will remain forever on some malicious instance that doesn't honor deletion requests. So be careful!

I think they are leaving out something quite important in this blog post - nobody is using their real names here.

It's very different from Meta or Google or whatever big tech company people have accounts on, where they know your real name and many more details, such as phone number and address.

I don't see the privacy danger in someone sweeping up what we are talking about here, since we are pseudo anonymous. Am I missing something?

Whats the value of random aliases discussing something and why is that a privacy issue?