Spamhaus Nightmare: Domain Shut Down, No Notice, Over A Million Pages Down
The Spamhaus people are bad guys.  I gradually realized that during the time I worked on spam filters.  They presumably started out with good intentions, but the position they're in has corrupted them.It's true of a lot of the guys running blacklists.  And more generally, of a lot of people in the position of police.  You tend to become a mirror of whatever bad guys you're fighting.  Your tactics have to match theirs, and pretty soon your principles start to as well.  I suspect this tendency is so universal that you have to make a conscious effort to avoid it.