This great, but terrifying, Bloomberg tear down on Palantir is a long read, but is instructive on how, as a former JPMorgan cyber expert points out "nefarious ideas became trivial to implement; everyone’s a suspect. It was a pretty terrible feeling.”
Over time, however, Cavicchia himself went rogue. Former JPMorgan colleagues describe the environment as Wall Street meets Apocalypse Now, with Cavicchia as Colonel Kurtz, ensconced upriver in his office suite eight floors above the rest of the bank’s security team. People in the department were shocked that no one from the bank or Palantir set any real limits. They darkly joked that Cavicchia was listening to their calls, reading their emails, watching them come and go. Some planted fake information in their communications to see if Cavicchia would mention it at meetings, which he did.
https://www.bloomberg.com/features/2018-palantir-peter-thiel/