He has already crossed the line. He should know better. Any advice that he gives,(and he gives alot) should always be prefaced with notice that he is not allowed to solicit the listings of other agents. He can argue that he is not, but the reality is that he is.
His bet best bet is to back off and let the seller handle everything themselves. After the cancellation is in full effect, then the sellers are fair game. Naughty, naughty. Porkman