@frostschutz: I distinctly remember seeing the idea of using an udev rule to run stuff in various places, some of which appeared to be quite old. I can't think of any examples OTOH besides your AutoPatcher, I'll see if I can dig up specific examples once I'm back on my desktop. (EDIT: Definitely the night mode installer, at the very least).
As for the other thing: there's actually a TODO in the script triggered by the udev rule to switch to using start-stop-daemon from there ;o). I just haven't done it yet because the current method works, I'm not reinventing the wheel, and I didn't want to spend too much effort on all this anyway
. But it's definitely in the cards, I've never been a fan of modifying system files on those things, which is why I originally started messing with this stuff back in the Kindle 2.x days
.