In truth, thieves often do have at least some form of honor.
Look at regions of the world controlled by gangs and by organized crime. If such a group accidentally stole from a party they never intended to, they'd put it right. They wouldn't just say, "Oh well, screw that school/orphanage/hospital/daycare/et cetera, we're gonna keep the goods anyways". Likewise, if some outside group steals from such a victim in a place under the protection of a crime group? They're gonna go find the perpetrators, teach them a lesson, and take the stuff back. And naturally, the cops aren't gonna hear about it.