this is not a scam id. I'm one of his employees. You can check my information on google. You could identify from the paypal account itself if its a scam or not...By the way, how many job orders did you receive from him? you've mentioned you have completed close to 100 250-word articles? do you have e-mails to prove that you've sent completed job orders? Could you post a screen shot of all your conversations with him thru e-mails? Lets all be transparent in proving this issue. I won't vouch for him If he is not true to his word. You can even traceback my ip address since I am using my yahoo account.
I think moderator is not aware of it till now, why you don't contact when you see any of moderator in online via PM. I think this should be work.
I have contacted most of the mods through PM. Not even one of them replied back to my PMs. And this is often the case on DP, AFAIK!
this is gonna sound bad, but if he doesn't make any effort to contact you, the best way to get back at him is to blog about his website. It could damage his and his website's reputation, prompting him to pay up for what he owes you. I am in the same situation (excuse me for replying to this post after 4 months!) and what I did was to blog about my client and his website for months until he can't take it anymore. He paid the full amount of $500 he owes me. Hope that works for you too.