He has been previously banned for sending unsolicited PMs attempting to buy accounts. He has hosted signature campaigns previously which then have run into issues due to him. As a general rule of thumb I would not join his signature campaigns.
https://bitcointalk.org/index.php?action=trust;u=77441 - my trust doesn't count so I'm hoping someone who is trusted can back me up here. He needs at least a warning put on him.