Pro(mo) And Con

I understand why TV regularly shows promos for its programs. But I wish they wouldn't.

First, they give away plot, and I'd rather be surprised. Also, every episode is advertised as an especially good on, which is obviously a lie.

But what I really don't get are the promos for Deal Or No Deal, where they actually show how far someone gets in the game. All they have is the game, and showing part of it in advance destroys any suspense until you catch up.

(It's a sign of how few sitcoms I watch these days that I'm not complaining about how they give away the best jokes.)