Why not do a no Internet day? Will be easier to communicate that. Give people a taste of normal life. They will automatically quit on social media. Like every Sunday no Internet day.
That actually would have been a great idea, in hindsight. I have seen far to many people who suffer from intense anxiety if they have no internet or device access, even if it's just for a few hours. It's like a form of addiction. A day away from the Internet each week would condition people to be able to survive without it.
I just spent seven days with only a limited data plan. I felt like time slowed down to a crawl and I was able to do much more than on a regular day with the internet.
I've cut down to a 2GB plan for this reason. Initially I was just switching networks but I stuck with it because of how much better I felt. Being more data conscious made me realise how much time I was wasting. I used to consume 2-3 times more data and now I don't even hit my cap anymore.
The point of the strike is to promote another kind of social media, not protesting against it all. A No Internet day could still be done, but conflating the two would miss the point.