cryptodevil has zero trading history and as a result if he is incorrect about a rating his reputation will not suffer (because he has zero reputation to start with), and as a result he has no incentive to give out ratings that are reasonable, supported by facts (instead of speculation), and to remove a rating when it turns out he is wrong.
There is the threat of being removed from the default trust list, if his ratings are unreasonable.
That should be sufficient.