For some reason nothing grinds my gears more than people downvoting my comments. This script lets me build up a defensive wall so thick you can't get through it with dynamite. How's that for insecure?
If this script has taught me one thing, it's that karma is just a number with no real life redeeming value. Install this script and move on. =)
On a side note: I usually comment out the 'hide vote arrows' section, only because I like to promote good stuff.