It's a link to a comment on this subject that says:

Ok, so to explain. This DID happen,literally 500m from my home :) the system was designed to store reg plate numbers and later turned to a speed camera. The stunt was done by a few students of the Technical University, it did bring the whole db down. They tried to revive it, but ultimately the boards have been dead for the past 5 years or so. Mind that this hack was performed around 7 or 8 years ago:) I can provide pics of the dead board now and exact coordinates too:)

And then later in the replies they do give the coordinates of the camera billboard thing they broke, and someone posts a Google Maps screenshot of the board at the coordinates they gave that just looks like a little digital billboard that's turned off and is just black, and the OP confirms that it is the board they mentioned.

Hope that all makes sense; I've got a lot brain fog/stress brain and stuff and it felt like too much to screenshot lol

This is complete guess work but I'm pretty sure its the kind of things that was put together by some office assistant not a developer.

Real parks and rec vibes.

I don't know what a database is and it's been too long im afraid to go ask