To be honest, I’ve seen commercial 7’ racks in data centres and computer rooms that were worse than the worst ones here!
I was once tasked with rejigging 3 racks in a remote computer room. The racks were arranged in an “L” pattern due to the constraints of the room. None of the doors - front or back - could close because of cables running between servers and switches. Some cables actually ran diagonally across the L shape. A lot of cables were jammed between the mounting rails, and 3 metre cables were used where a 50cm one would have done, or 2 metre ones where a 3 meter or more was needed. Almost nothing was labelled, and where it was, it was wrong. The cable colour coding scheme was ignored, and nothing was recorded. There were servers racked on a slant - TWO nuts off on one side - and even mounted back-to-front. Others were literally sat directly on top of other kit, not bolted in at all. RAID arrays for critical servers were mounted in adjacent racks, with the cables running around the opened rear rack door, and there were a number of suspicious, unmarked servers, of odd brands that were hooked into the main switch, that nobody could identify. One turned out to be an abandoned Nagios server, but one was never identified, and nothing broke, nobody screamed when I turned it off.
Just about all the horrible things you have seen or heard about were in that room. It took weeks to sort it out.
I had a car dealership I was to add new servers into a new rack and recable it. I walked into a room with about half a dozen servers balanced on a pile of cat5, BNC and serial cables about 4’ high. I spent 3 weeks untangling cables, removing dead cable, decommissioning serial and token ring networks and re-terminating or re-running ethernet that didn’t test well.
Pretty much everything was done by scream test because nothing was marked. I found an ancient server that was still used for manuals occasionally that was drywalled into a old closet in the shop when I traced down a line I disconnected and one of the mechanics asked where his manuals had gotten to. That server was shut down every night when they turned off the shop lights and booted back up every morning for who knows how many years when someone came in to work and turned on the lights.
I eventually got to the point I could set up my rack and SANs/servers, patch everything over from the network rack I mounted on the wall, and get guys going on the workstations.
We had a series of meetings after that with the sales team about getting a technical appraisal before we sold our equipment into dealerships. And every dealership I worked in after that was pretty similiar.
Honestly, it was an amazingly satisfying feeling at the end to look in that room after I was done. I get a little shiver 20 years later thinking about it now.