I'd really love to see a "Perl Style and Security Coding Guide" (hopefully with a better name) that covered all of these things.
For myself, I have written a lot of garbage scripts that exist out there on the net right now without -w, use strict, taint, etc. I didn't know better when I was starting to lean Perl because there were no resources (especially no single resource) that covered these. The books I learned from never even touched on tainting, or if they did no "Why this is important" info was given.
Kickstart