Visitor Shenanigan's

So be careful who you add :)

I second that advice. be careful who you make as Best Friends. Remember giving someone Best Friend status should only be given to a person you can truly trust. I you know who it was you do have the option to remove them your friend list.

Only Best Friends ccan do that so remove them. Bog is right, be more careful. Lueky that everything is very fixable.

Looking through your recently played with list can narrow down WHO the offender is. Once found you can revoke friend status or even block (for serious, or repeat offenders) :)

Unless you have Many Best Friends this should be revealed quite easily