I've been noticing a trend towards advertisements whose apparent goal is to try to get the watcher/listener to turn off the commercial.
There is that television commercial where you hear someone crunching cereal into the microphone throughout the entire ad. I can't bear to listen to it for more than about 10 seconds before I hit the mute button.
Many radio commercials seem to utilize the ever-annoying ringing telephone as a means to get your attention. Bascially I treat this as I do an unsolicited sales call. Radio commericals also like to use the crunching technique for various snack food items. Again, I turn down the sound until its over.
The logic of annoying prospective customers as a means of convincing them to purchase one's products completely escapes me.