At the point to start a new facebook-account for example it tolds me, that calender & gallery is shared. Some files are cached for offline use. Same in google or twitter. I dont want to break some possilbe dependency, when delete those groups and accounts on the phone.
Can’t quite make out if there was a question in there somewhere, but indeed don’t remove those groups if you don’t want broken accounts. If you won’t be using Facebook it should be safe, but also completely useless, to do so.
