If you summon a creature, bind it to a hat and use it to sort out people in to certain factions, there would be little trouble. If that same hat/creature was putting subtle compelling magic on every it wore, you'd be in trouble. You summoned it, bound it and told everyone "It's perfectly safe!" (while thinking
'Mostly...') That means its your responsibility.
It might not get you the same cumulative tempation as doing it yourself, even if you purposely made the hat to create Manchurian canditates,
. But if you done it with one item, why not with others? Why not make good on those hidden commands you have implanted? In practice it would be different, but I'd say the same mechanics apply.
Now if you could somehow enchant an item to perfom something like the Sight/Soulgaze on people, you could glean some information. But, as with using it yourself, you'd have to interpret the images yourself. Someone seems angry, okay, but why? Towards whom is it a murderous hate directed? Is that a shadow of a man looming over her? Is it an abusive father or a dark spirit?