Ping-pong catcher

I have just completed a chore that I have to do every few months. I have to move the TV cabinet away from the wall a few centimetres so that I can stick a ruler underneath it and flick out all the ping pong balls that have accumulated there.

It has me asking why on earth would you design a cabinet that has a gap underneath (only accessible from the rear) just big enough to catch ping-pong balls?

It is very annoying.

How the balls got there in the first place goes something like this (but with one fat cat indoors)