Facebook Chat API - Is Chat possible with 2 unknown users?

Question

I was wondering:

1. Is it possible to chat with a friend who is not in our friend list through the API?

2. Can 2 Unknown users use the Facebook Chat API to communicate? Is it possible anyhow (using PHP or JS?)

Answer 1

No, the only way to do this would be through the use of the Send Dialog where you could specify the UID of the non-friend in the &to= parameter. There is no API method publicly available for sending messages to non-friends.