Black holes are a good example of information destruction. Matter and energy fall into the gravity well, and eventually are reemited as Hawking radiation, but as far as current theories go, there's no way to reconstruct the information that made up the original matter or energy from that radiation.
Information isn't a "thing" but the relationship between, and exact quantum state of, things. Once that state is disrupted, the information is gone.
The pace of development of Piefed really is something to behold! I like the new menu structure with communities at the top, but I know others would prefer feeds there, and frankly either is good. However, could we get the mega menu as a separate page too, so I can bookmark it?