[Real Cynic No More]

I think there might also be the right of the shopkeeper to be secure in his effects against seizure from a thief. If people can hide stolen merchandise without risk of being caught, then his/her fourth amendment rights are violated. It seems to me that searching the packages of those who leave the premises is a reasonable balance between the fourth amendment rights of both parties.

[KrisKrinkle]

"I think there might also be the right of the shopkeeper to be secure in his effects against seizure from a thief."

I meant to respond earlier that that's a good point.