Have you had any luck with FB this way? There's local history groups I'd dearly like to back up for future generations - plus posts from 6 months+ ago are already hard to get to.
Honestly haven't tried. Facebook's services are generally pretty rock solid in terms of security though, and any efforts of reverse engineering (e.g. Messenger) I've found seem to get abandoned due to the effort required.
You'd probably be best sticking with web page scraping via something like Puppeteer, but even that'd be difficult.
