You just gotta love stupid criminals. There's a simple, but oh so compelling and poetic justice in seeing people fail at being bad.
Take for example this bunch of washed up junkies trying to rob a bank, when they can't hardly stop fighting amongst themselves. Contrary to the super-cool heist films where slick criminals pull of the most intricate plots while being chased by a bumbling detective, the fun in this one comes from knowing their ploy is doomed to fail from the very beginning, and wanting to see just how much they'll fuck up.
If you enjoyed Weirdsville or Contact High, you'll definitely love this one too.