Your reader commented, "If there are other documented examples of this kind of behavior, they need to be compiled into a single place so we can get a handle on exactly what kind of society we are running here." There is; Radley Balko has compiled a map of botched paramilitary police raids at Cato.org. I think at this point the map might be outdated (the last year available to search is 2008), but it gives you a good idea of how often this occurs in the US. Balko has done extensive work on this subject. I suggest you point your readers to his 2006 paper on the rise of military tactics in fighting the drug war.

Another writes:

Balko's been regularly posting stories of what he calls "puppycide" for a couple of years now.  A search of the term yields 130 results.

Another: