Idiotic no, but definitely not the right thing to do. Like your amp, the CD player needs to breathe and more than likely has air vents that are blocked or partially blocked by placing anything on top of it.
If you need/want an extremely good audio video rack that is highly customizable and relatively inexpensive as far as high-end A/V racks go, look no further than Salamander Designs.
http://www.salamanderdesigns.com/
If you need/want an extremely good audio video rack that is highly customizable and relatively inexpensive as far as high-end A/V racks go, look no further than Salamander Designs.
http://www.salamanderdesigns.com/