@plethora - thank for the tip, this is an interesting direction that can do the job, the only minus to that is that it happens after the abuse was made. I'm trying to thing also in the direction of creating the conditions in which the wanting to abuse won't arise as much in the first place.
@Swiftcoder - I agree with you on the restriction on Journey, it was an example to show a good experience with strangers...
I won't be going this direction of constraining though.
WAY is less constrained, since there are more communication options in the game play, mainly through gestures.
I don't really know of free communication as part of the core game play (chat/skype in games like MMO's are a supportive channel, not the main thing).
Can it be that allowing free conversation as the main gameplay is a big NO-NO? otherwise, why it hasn't been done yet (as far as I know).
A free conversation is one the peaks of human experience - can it be put in a game?
In card games there are examples of great design for freedom without abusing ("Once upon a time" is a great example) - but in the digital realm I don't know of any.
Draw Something is the closest I know - and it's communicating with drawings, not text...