I have deleted Facebook on my iPhone multiple times to delete Documents & Data from storage. Then I go to the App Store and download it again.
Raise your hand if you've done likewise.
Looks like it might be time to do so again.
More than 1 in 4 American users have deleted Facebook, Pew survey finds. (San Jose Mercury News, 9/5/2018)
Americans are changing their relationship with Facebook. (Pew Research, 9/5/2018)
Apparently, there was no follow-up question.