No, your other friends on Facebook will not be able to see your messages that you send to a single friend. Private messages are just that - private.
yes
no because police and FBI can get into it. Also hackers.
you will not be able to send that person private messages
There are no personal, private messages on WikiAnswers. That is not one of the purposes of the site.
You cannot send a private message. If you try to send a message to anyone on WikiAnswers, there is a little caption below the place you can type in that says, "This page isn't private. Although this is for messages to [inset username here], anyone can read what's here." If you want to send a private message, you must do so through e-mail.
'Send messages' in French is 'envoyer des messages'.
No you can't, but if that person is following you too, you can send private messages to each other.
You can only send a message and that too the person who follow you. You can however send public messages using the "@" sign or if they are following you use the "D" symbol to send a private direct message.
to send error messages to send control messages
Just get the IM and send as an attachment.
Yes. You can private message them. Go to your inbox, compose, and select a username