this is an idea which just came to mind: when creating a Private Conversation, so meaning I have initiated and send a PM to a certain person. After a certain time I decide I actually should not have send this information to this person. It would be cool to have an indication whether the receiver of the message has already read the message or not. If the receiver of the PM did not read the message yet, then it would be great to be able to delete the message. I am talking about the first message which I have send to a person whereby myself initiated the conversation. Sort of: "I want to pull back my message" and the receiver should not be able to read it.