To test your hypothesis, I created a quick FB account. I’ll even tell you the name (since I will delete it soon enough: Quup Poopu [lol] ).
I lied on everything, after creating a equally false outlook.com ID.
No home town needed and I can now use it to look at any and all open IDs. Want me to go further and look for exposures?
Now go and tell me what you “know” about me from that ID.
You’ve made my point. You can go on FB and not have to worry about ID theft. Nice to have you aboard, fellow FB user.