" just a bunch of perl, rexx, sh/bash and python scripts written just to automate some work. I doubt anybody would think those should be cleanly written"

I do. Even though my quick and dirty scripts are not always clean either, I still profit from the times when I take some more minutes to document what a certain script does and clean out at least the rough edges.

Otherwise it means rewriting the same thing again and again, which costs more time in the end. Or it means executing something you barely understand yourself anymore, which can be dangerous.