A good first step would be to force Facebook to let users easily take out their data in machine-readable form, including their social graph, posts and media.
They have done that voluntarily for years. It's under your settings. One thing they don't currently allow is a complete and utter, real, deletion of your profile and all of its assets. You can delete your account, but it's more or less just held in a suspended state.
> They have done that voluntarily for years. It's under your settings.
Only kinda sorta. I exported my data and the photos were clearly lower-res versions from the ones that are currently live on my profile. Also I doubt the export contains all the data they have linked to you, as I bet they have far more from their tracking, analytics, and shadow profiles that they won't export.