Not really though. Every time it's used as a plot device to create suspense but in the end the hero or villain has been trained to beat the polygraph and get away with it. So they actually perpetuates the idea that it's fallible / can be fooled.

> So they actually perpetuates the idea that it's fallible / can be fooled.

By doing that, they also perpetuate the idea that it does work somewhat reliably and to beat it, you need special training.