Back in the fall of, I believe, 1989, I saw a greeting card for sale that congratulated the recipient on her (/his?) divorce. Self-proclaimed liberal though I was at the time, something just didn't seem right about that. Age and greater experience (especially my ten years of marriage) have persuaded me that it most definitely was wrong; as Chesterton might say, their having a right to make and sell that card is in no way the same thing as being right in doing it.
But it wasn't as wrong as this: Divorce parties. I'm well aware of the need for ritual to mark even the most unpleasant of life stages (former neo-pagan, current Catholic--I grok ritual), but celebrating the failure of a marriage is both repugnant and irresponsible in the message it sends to everyone around you.
What's next, abortion parties?