This is awesome.
The real headline is: “Feckless, naive parent surprised that a young child doesn’t turn-up to birthday party, responds completely disproportionately”.
Anyone that ever arranges any sort of group activity involving an up-front payment KNOWS that people aren’t confirmed as attending until they hand over the cash.
You might trust your mates, but you certainly wouldn’t trust your child’s classmates (or their feckless parents who you don’t know from Adam*). Surely everyone certainly knows this by the time they are able to breed?
*it’s not known whether Adam attended either
The sixteen quid is just a tax on naivety.
Think of it this way, it’s your birthday and you book a Karting event for 20 of your mates and they all agree to pay £50 as their share of the £1000 the event costs.
Would you just cover all the 50 quids of your “mates” who didn’t turn up for your “birthday party”?
To use your analogy, would (in the above scenario) you issue an invoice (via your mates’, child’s schoolbag, obvs) to the mate that didn’t show up, threatening to take them to court if they didn’t pay? Or would you take them to one side, explain that you were out of pocket, and ask for the money? One of these approaches would identify you as a muppet, and worthy of national derision…. and one would just be normal, adult behavior.