I agree with you ippy. She didn't smash them in uncontrolled rage, she banged them against the table - after warnings. Might even be able to have them mended for all we know! I had computer mended after walking on screen when it was open on the floor.
Maybe we wouldn't have done that, perhaps locked them away somewhere for a while instead but what's done is done. Kirstie Allsop said in the Jeremy Vine interview that she hadn't talked about it before (& I bet now she wished she'd stuck to that), but parents of young children are always moaning about how long there kids are on their ipads despite rules, and trying to come up with ways of reducing it. Kirstie did. Bit drastic maybe but not the end of the world.
Someone I knew cut their child's bike in half because people had told him the kid was careering around on it unsafely. Again I think I'd have locked the bike in garage but the boy had been warned and eventually dad had had enough. Life went on, he wasn't a bad father.