Well, this probably happened, that he realizes that he made a mistake.
And and if he did not do that, he would get a negative rating?
Report the post with the message "Referral link in the message" and then leave it. There is no reason for making a thread on "Reputation" about it.
These reports are for the moderation team to take care of and once you have reported it you can breath of sigh of relief that you have done your part.
Posting a referral link is not a valid reason for a negative trust unless the site being advertised is a scam site. I can no longer view the message so I guess the staff has taken care of it and this thread should be locked.