The forum policy is that mods won't ban scammers as they may return later to repay what they scammed. The trust system is there for a reason, and that reason is to make scammers have a bit of a harder life.
And unfortunately most people never see trust because only a couple of active members are on the default trust list. I guess not many bother to check under untrusted feedback.
Yes this is really bad the untrusted tab should be loaded by default (not need to click)