A court record reviewed by 404 Media shows privacy-focused email provider Proton Mail handed over payment data related to a Stop Cop City email account to the Swiss government, which handed it to the FBI.

https://www.404media.co/proton-mail-helped-fbi-unmask-anonymous-stop-cop-city-protestor/

Proton Mail Helped FBI Unmask Anonymous ‘Stop Cop City’ Protester

A court record reviewed by 404 Media shows privacy-focused email provider Proton Mail handed over payment data related to a Stop Cop City email account to the Swiss government, which handed it to the FBI.

404 Media
@404mediaco Hmmn, I have a free account there, but there are arguably other ways for a Swiss court to identify me. IP would, but I use TOR.
Any thoughts folks, on how to de-anonymise me?
@davecb @404mediaco E-Mail content and metadata would be the most obvious way. If you ever used this account for anything that could be linked somehow to your identity they could easily deanonymize you. And otherwise it depends on who wants to get your PII and how many resources do they have. If they have enough ressources they can deanonymize everybody and tor will not help you. But for most people that should be fine I think.
@davecb @404mediaco other than that I guess you use the Tor Browser (and not just a standard browser routed over Tor) on a somewhat save OS (no Windows, macOS, Android etc but something like Linux/GrapheneOS)?
@DrRac27 @404mediaco Linux, for something that would be considered "restricted" (in the sequence restricted, confidential, secret and top secret)
@davecb @404mediaco disconnect from any external network is the only way. Anonymity is a myth on the Internet and all you can do is make it more difficult to track you. As soon as you connect to your ISP, you're putting your trust on numerous unnamed third parties.