One chestnut from my history in lottery game development:
While our security staff was incredibly tight and did a generally good job, oftentimes levels of paranoia were off the charts.
Once they went around hot gluing shut all of the “unnecessary” USB ports in our PCs under the premise of mitigating data theft via thumb drive, while ignoring that we were all Internet-connected and VPNs are a thing, also that every machine had a RW optical drive.
The DOD was like this. And it wasn’t just that you had to change passwords every so often but the requirements for those passwords were egregious but at the same time changing 1 number or letter was enough to pass the password requirements.