This reminds me of a story
Several years ago I read a story of a Uni student who decided to try an map the various bits of cabling that existed in a particular location from public sources of information.
He observed some risky conglomerations of various bits of infrastructure on his map.
He observed that one particular bank had all of its communication infrastructure going through one point accessible by a manhole cover a little bit down the street and around a corner.
He went to the bank and asked then if they were aware of this vulnerability. The bank got very upset and would not let the student leave the building.
Some alphabet agency got involved and they promptly hired the student and got him to do the same project on a national scale.
Biting the hand that feeds IT
