Good vs evil?

I'm getting a bit tired of the perception that people sit on one side of the fence or the other. You know, evil or good.

Films are especially obsessed with this notion--so much so it's getting ridiculous. The first thing a screenwriter seems to get asked by a studio exec these days about any character is, "Is he evil?" While the contrast might make for really easy-to-write screenplays and novels, it gets sort of tedious after a while.

I had an idea in this vein for a scene--I have nowhere right now I'd actually use it, so feel free to swipe it if you want. There's an evil guy--stereotypical evil, mustache-twirling, nasty laugh, etc., etc. Our band of intrepid heroes--a group of teenagers--are fighting against his malevolent plot. Then, they encounter a group of people who are, beyond question, good--their benevolent if oblivious parents--socializing with the villian, making conversation, hanging out with him, for Chrissakes! Even planning to do business with the guy. He must have them under a spell or something. Our parents would never team up with someone so obviously  evil.

So, eventually, after failing to defeat this spell the bad guy has their parents under, or even to discover it's nature, our heroes just confront their parents while they are meeting yet again with the villian. "Don't you know he's evil?" they say. "How can it not be obvious to you?"

The parents reply is, "Of course  he's evil. Duh! But he's really funny and he gives great income tax advice."

Like I said, funny (to me, anyways) but I got nowhere to use it. Feel free to use it yourself if you want. Just be sure to let people know where you got it from.