Anyone know if em client has any privacy pitfalls?

If I sign up using phony info and use a new email which is only for fb, always use a vpn and a browser (chromium) that I only use for fb can I be anonymous? I ask because there a couple groups that I'd like to join that only use fb. Thanks.

I got my mom a new iphone. On her old phone I set up the privacy settings according to a couple of guides I found on the old privacy guides subreddit. Will the settings survive being transferred to her new phone? Thanks.