What could be more sinister than trust? Would it be related to dependence, or love?
Hesiod might say hope, which is a form of trust with no validation.
Essentially, after Prometheus brings fire, Zeus, instead of invoking another cataclysm, devises a fate worse than death: Hope as the greatest mind game ever.
But, like everything else, hope can be either good or bad, useful or futile. Likewise with trust. Fire itself, one of the greatest boons to mankind, can also be destructive. This seems to be the nature of things.