Now tell me how do you buy food and pay for necessities , without said income.
DT members blacklist people without proof, and block income from signature & escrow services, which they can then monopolize for themselves. So thinking that they don't hurt people , is pure stupidity on your part.
Signature campaigns are a privilege. They should not be your only source of income because that creates an unstable reliance upon the campaigns. As well as this, it perpetuates spam. If you're forced to post for money, the type of discussion you're involved in is not necessarily that of a constructive nature. See Gambling discussion for reference.
Oversight of Ratings by 3rd parties before a negative rating can be entered
Who? And what if that third party is corrupt? You'll need an nth party to monitor them.
or
Members have to agree to receive positive or negative ratings during escrows and trades.
Wouldn't you only then trade with people who agree to receive the ratings then, given that those that don't agree are more likely to scam - since there are no consequences? Nothing will change in that regard.
Still waiting for you to comment on how the majority of trust feedback sent out is valid, opposite of what you've been declaring consistently.