This is what I'm thinking. Sirens are rare up here, and when I hear one the scanner goes on immediately if it wasn't on already.
My guess is that many more citizens benefit from non-encrypted comms than criminals. But the lawful citizen isn't represented adequately.
Just like guns. A homeowner defends himself during a break in and its on the back pages and no big deal, if it's reported at all. A thug shoots a kid in a drive by and it's front page news.