Your argument from authority is a logical fallacy. My "expertise" is irrelevant to the points I have made. If you are unable to defend your position logically, it suggests that your position does not posses sufficient merit to be defended. Once again, I was perfectly civil in my reply to you, and I would expect the same in return.

The rest of your post regarding due diligence is completely correct. We should be teaching all users to read individual trust ratings. But this is not an argument against leaving negative trust. Someone promoting a Ponzi scam is not trustworthy and deserves a negative rating, not a neutral one, regardless of whether he has yet managed to lure in any users or not.

You completely ignored the other points I made about your suggested system, so I will ask them again:
1) Under your system, starting a new thread to discuss every suspected scammer is a non-viable solution - the workload for DT1 would be insurmountable. How would you address this?
2) The community already have the ability to include and exclude people who don't follow your rules, but that's not happening. I don't think a simple post from theymos, with no other intervention, would result in the change you are looking for. Do you?