That is diabolical, especially since most minifigs are in separate baggies. The thief must have purchased the set, taken out the minifigs, resealed the box, and returned it as “unopened” to the store. If they paid cash, it would be nearly impossible to track them down. I rarely buy sets from retail stores anymore (mainly from S@H or a Lego Store) but would be really p-o’d if that happened to me. Greg, are you going to open any of your sets to see if they are intact? You could still list them later as MIB with a notation that the box was opened only to verify that the minifigs were intact.