01-03-2013, 05:14 AM
(01-03-2013, 12:21 AM)kandrathe Wrote: In hindsight, for many of these cases of mass homicide, even the militant ones like McVeigh, they alerted their family, friends, the public, and sometimes even government officials. They often gave big red glowing neon clues that something was wrong and dangerous. These sociopaths are not always the stereo typed silent loners who one day decide to go strike back at someone or the society. They alarm and creep out everyone around them who are seemingly powerless or maybe just clueless to do anything about the impending social train wreck.
Several problems. First, the "big red glowing neon cues" show up a lot more often than mass murderers. Like, thousands of times more often. There is a lot of noise, and very little signal.
Second, we have very poor discrimination. Type 1 errors are very common. What distinguishes the dangerous ones from ones we just don't like much? When does identifying potential dangers cross the line into enforcing social norms with state power? Who do we trust to make decisions about who is dangerous, and why?
Third, it's difficult to say what to do with people who are identified as threats. They have rights. You can't just lock them up, and you can't infringe on their privacy. But as you rightly say, some of these people who killed were already under observation of one kind or another. Didn't help, apparently.
I have no doubt we can see the patterns ex post. But if we're going to prevent these massacres before they happen, we need some pretty powerful predictive tools. I don't think we have them.
-Jester