this is a serious problem that needs to be dealt with before the whole trust system becomes useless.
What you mean is probably Default Trust, which is pretty much guaranteed to upset some users due to its one-size-fits-all nature.
The trust system itself is fine. You can create a custom trust list if you don't like Default Trust. The problem is how to encourage/coerce/force more users to do that.
The problem with DT is not solved by making custom trust list. The problem is that DT exists. It's used poorly, in a way that encourages people to specifically
not make custom trust list. They contribute significantly in portraying DT as an universal "super trusted users" list, which is only an illusion. There have been (and still are) scammers and dishonest people in current DT.
DT
should only be a ramp-up "people who are unlikely to scam" list of users, and it should require absolutely nothing else to be on DT.
Anyway, there should be no such DT thing at all, IMO. More about possible solutions,
presented by theymos. My thoughts about DT are also in that thread in
here.About the trust system: Trust system itself is not working very well, but it's quite hard to make it much better.