Yes they can, but it's a pain in the arse to run apps on your phone with it. There can be costs attached. It's not about perfect, it's about making a dent.

If you are a parent and you know that the government are stopping kids from using snapchat then you can disable the app from your childs phone. So yeah, they get opera and use it from there under a VPN but the experience is vastly different to having the app that buzzes in your pocket every 15 seconds.

It's cutting the dopamine, cutting the addiction.