Creston, there was actually another poorly-coded setup program back in the day that was just as bad as Myth 2: Sierra Goddamn Utilities. I think I was one of the unlucky few to have provoked it.
I am usually doing lots of things at once, with lots of hard drive thrashing, so I didn't notice it was screwed until half my hard drive was gone. Sometimes I don't know why I even bother using uninstallers.