I'm bugged by commercials that show vehicles doing things that they couldn't do if you actually bought that vehicle. So...
#1 on my current crappy commercial list is the Nissan Frontier commercial where they land a passenger jet with a jammed front landing gear in the bed of the pickup. In real life, the downward pressure of a passenger jet landing in a pickup truck results in 4 instantly blown tires and a crushed bed in the truck, whoch would then likely be followed by an imploding, fiery gas tank, and looks of horror from everyone watching from the SkyLounge - instead of a round of applause.