I have an idea to fight scam. Some of our most trusted member, maybe a mod, would verify the guy's identity. If the guy is scamming, his identity will be released to public. Another thing that would work is using escrow and bitcoins. Bitcoin escrow is only 1% of money and cover up to $500. Say you're doing adsense JV. By end of the month, the account owners should already pay the escrow. The escrow will release the fund if and only if a copy of his adsense code still shows up. The account owner can still fool people by disabling the ads even though the adsense account is not disabled to pretend that his account is disabled. Or something like that. So yea there will still be loophole. However, everything will be cleared. Another thing we can do is to make sure that the pain for scammers is huge.