Face book

They potentially can. Check your privacy settings.

Couldn't you just ask your FB friends?

By coincidence I've approached my own Facebook Friends with the following

I might participate now and again but Facebook ejected me when somebody in some remote country of Eastern Europe began using my password. I subsequently objected that it's okay for him to do that but I won't adopt a new password so please reinstate me anyhow. However Facebook rejected my message because it now doesn't recognize me

(Some years ago I quit all forums requiring unique ID because I resented having to remember 50 passwords)

Maybe you could relay my message somehow. Thanks much

Your leftout buddy
Dale