Put privacy film on the sliding doors at the kids house.
When I was living there I thought..."I should put film on them"...but figured it would be a PITA to put on.
The cats were always detaching the vertical blind slats...and I thought they'd just swing from the damn curtains if I put them up.
Grand kids are about as bad or worse than the cats
...and I was right it WAS a PITA to put on....but not as horrible as I envisioned.