Trying to inspire consumer activism against Comcast's (NASDAQ: CMCSA) proposed purchase of Time Warner Cable (NYSE: TWC), the Consumers Union is using a little humor in its just-released national TV commercial. According to the spot, the corporate union is as bad a pairing as NBA legend Dennis Rodman and Korean dictator Kim Jon Un ... or reality star Kim Kardashian and her short-tenured ex-husband, pro hoops role player Kris Humphries ... or celebrity punk Justin Bieber and a Lamborghini. You get the idea. The Consumers Union's rather funny TV ad can be viewed here on YouTube.