system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5, Is the FBI and NSA running Tor?

Ever since the big bust of The Silk Road, why wouldn't the FBI or NSA build its own Tor network to track users in the dark web?
gpt
The relevant software is open-source and known to be reasonably secure. The FBI itself said it was mostly helpless against Silk Road and whatnot until the people messed up in their use of TOR to reveal themselves. (Things like client-side scripts, for example, should be off as it could potentially be used to figure out who you are despite TOR.)

It is theoretically possible to create TOR entry and exit nodes that are compromised to get some information, and if you have the majority of entry and exit nodes in your pocket you can basically consider TOR itself useless as a means of anonymity.