At Friendica the profiles are mostly protected from being follow automatically. In general one has to accept follow requests. In our own protocol we can add some notice, why we want to follow that user. The user then sees the message along with the follow request (“I want to follow you, because …”) and can accept, ignore or deny the request.
Question is, what field could be used for that message. I guess one of these fields would be possible: “content”, “name” and “summary”.
What do you think?