Relevant HN Discussion: https://news.ycombinator.com/item?id=36673040
11 points
The problem arises when facebook links stuff you posted anonymously, with your named account.
2 points
14 points
The same way they do on Facebook and Instagram. By using the vast amount of data they have already collected.
1 point
So really, the headline, according to you should be “only not writing anything on the public web will be enough to protect your privacy”. You argument has nothing specifically to do with the Fediverse or Threads federating.