Darkness-Induced Audience Apathy: Part of the reason Tim and Eric moved onto other projects is that the show's ratings were miserable thanks to this trope. After a while, once it's clear Tom will be screwed over every chance the show gets, you stop caring enough to watch. Especially considering this was the only recurring joke the show really had.
Nightmare Fuel: The episode "Spray a Carpet or Rug". It starts with a toxic foam that causes people to gorily disintegrate, and ends with Tom hanging himself in prison, leading to a Mind Screw sequence where Satan appears as an extremely scary version of the Mayor.