Facebook Help Center - The search box contains a personalized message when you’re logged in.
/via Jimmy Oliger
Etsy - If you try to send yourself a message on Etsy, you get the error message “Talking to yourself again?”
Facebook - When you try to post your password on Facebook it turns into asterisks. /via jan the funny guy!
UPDATE: As it turns out, this doesn’t work. Sorry about that! Keep your passwords save folks and don’t accept candy from strangers.