There's no clear evidence but something I've long suspected is that users of VPNs and Tor (.onion) have less anonymity than they might imagine and potentially face greater scrutiny by NSA and Russia/PRC/Israel who have snooping tools we don't know exist. https://www.wired.com/story/using-a-vpn-may-subject-you-to-nsa-spying/
Using a VPN May Subject You to NSA Spying

US lawmakers are pressing Tulsi Gabbard to reveal whether using a VPN can strip Americans of their constitutional protections against warrantless surveillance.

WIRED

@newsguyusa

The specific concern mentioned is "strip Americans of their constitutional protections against warrantless surveillance".

Surveillance of all unsecured internet access that is lacking the protections of either a VPN or Tor, is the default today. One would be an absolute fool to believe in "constitutional protections".

It's 2026.