Self-moderate your threads in the future (you can lock that thread and start a new, self-moderated thread by ticking the appropriate box at thread creation). Unless he's spamming or blackmailing you, this probably isn't something they'll moderate for you since his posts aren't necessarily off-topic. They also don't moderate the trust system.
Yes, this is a good solution as well, maybe they will not moderate it and thanks for your response, BTW from last month I liked to see a donator, supposing how generous a guy can be, thanks from your response again