My GF was at church (without me) and had this creepy guy stare at her the whole service. He got her name and possibly address by watching her write out a check for the offering. He later friend requested her on Facebook.

Now she's calling me freaked out and scared. So far I've listened to her fears and anxiety. I've comforted her, telling her everything will be ok, he's not a serial killer, etc.

I'm not sure the best approach with this instance. Amused Mastery doesn't seem appropriate. Am I wrong? I don't live with her and I can't be with her until Wednesday. Any advice?

Edit: I could message this guy on FB and tell him to fuck off, but again I'm not sure if this is best.