I've only ever seen one instance where something from one of these shows made me throw my drink at the television:
Can't remember the name of the program, but they were turning a garage into a "livable space". The roof of the garage was supported by A-frame trusses and the people redesigning it wanted to leave the ceiling open. Somewhere during the show, some designer or similar idiot decided they'd have a lot more of an "appealing" space if they cut out all those ugly horizontal beams. Presto-chango, in the next scene you see where they'd gone through and chopped off the bottom of every single truss. If that garage didn't collapse under it's own weight god help it if they ever get any significant snow.
I can't watch those shows anymore, they're bad for my blood pressure.
-John
