Only an idiot or someone who doesn't know you can turn it off would use DefaultTrust, which is a sick joke. How many scammers and lunatics has that list had?
I think this is part of the problem of the mentality of people asking for trust to be moderated. Trust is not supposed to be a fool proof system. It is supposed to be a simple to use superficial indicator of ones trust. Depending on trust scores alone to judge your trading partner is not very wise, and this attitude really shouldn't be catered to. Before there was trust people RESEARCHED THEIR TRADING PARTNERS. There is no substitute for vetting your trading partner.