Ungrateful Little yuppie Larvae

Here's the source.

DEAR JERKASS: I'll bet this is an issue in many homes. When my son "Chet" graduated from high school, we gave him a very nice graduation party, which included his friends and family. He received many gifts.

I gave my son thank-you cards, stamps, and a detailed list of whom to send the cards to. So far, he has refused. Chet is normally thoughtful and considerate. I don't know what to do. I'm embarrassed by his lack of gratitude. I have told him we have received thank-yous from his friends and that the cards can be brief. Should I send the thank-you notes myself, or just let it go? -- EMBARRASSED MOM IN CALIFORNIA

Dear Embarrassed,
It's Chet's problem, not yours.  Get over it.
The purpose of a gift is not to receive gratitude.  A gift is given, no strings attached.  While saying thank you is the polite way to respond, he doesn't HAVE to.
If he wants to be an asshole, that's his choice, and not your responsibility anymore.
You may worry about saving face in front of other people, but then that just devolves into you worrying about being judged for your actions.
Don't worry.  The ungrateful little yuppie larvae will eventually figure out he gets less and less gifts because of being a jerk.  This might bother him, it might not.
Either way, it's his problem, and you can tell others that.