Yes, it appears that any fan is a "representative" and cannot contact the prospect.
Determining how to keep themselves out of trouble is up to each school to figure out, and I don't presume to speak for Duke. Nor do I speak officially for DBR. My personal opinion is that if we discuss a prospect or student-athlete in a fan-to-fan format, we are not violating any rules. So comments like, "He'd fit into our system well. I'd love to see John Doe in a Duke uniform next year" is OK to post. The content posted is not trying to make contact with John Doe to influence him.
However, if we create something online with the intent to contact and sway him, as in a thread (or blog or facebook page) entitled, "John Doe, PLEASE COME TO DUKE!" consisting solely of posts imploring him to come to Duke, that could be seen as trying to contact and influence John Doe.
The same would have been true of "Seth Curry contemplates ACC schools" vs. "Seth Curry: PLEASE TRANSFER TO DUKE!" before the transfer became official.
Do understand that anything posted here is seen by Duke coaches, Duke players, recruits, potential transfers, and their friends and families. While I'm sure there's an influence -- "Wow, a thread about me [my kid, my player, my friend] is HUGE and so positive!" But, IMHO, we need to make sure the discussion is about the prospect, not directed to the prospect.
Anyone reading from DUAA, the compliance office, or who has more information than me, please feel free to jump in (or PM me or any other mod and we'll pass along the information).