> being able to buy "off the shelf", two click VPN solution for 5$ already puts you into "geek" category

I’m not sure that’s true anymore. I discovered recently my 70 year old, very technology-averse, parents are using a VPN (much to my initial concern). I think it’s for viewing football matches, or so they can watch iPlayer when they travel. They’re advertised on buses, etc. They’re pretty common these days.

That said I think you’re right that a block at the App Store level etc is enough to cut usage significantly.