Trust is but half an exchange. Reciprocity is its conjoined sister. On the 31st of October, children trust that strangers will give them candy, homeowners trust that kids won't pelt their houses with eggs and toilet paper.
And on the morning of November 1st, we discover if that trust was warranted.
The jerkfaces of America occasionally find a degree of comeuppance in the form of yolk and albumen. But by and large, trust is rewarded with the elements of a fulfilled contract. Halloween is an ex ante contract; the day after is the ex post aftermath. And to the extent that all's well, that's cause for a little quiet celebration deep in the cockles of your euvoluntary heart.