Some examples of how not to treat your servers...
I was young, I didn't know better.
My first server "rack". In a cardboard box...
There were three computers in here... And Lego. Can you spot them all?
Cardboard replaced with laminated fibreboard. Also added a 4th computer.
Lots of very dusty storage space. Well, it was a lot of space back then.
The collection of computers soon conquered the entire closet.
Moved to another closet, added more glue and yet another computer.
I hadn't heard of cable management...
On the other hand, the heat was handled well by this temperature controlled fan.
The "exhaust pipe" led straight out the window.