1) many thieves doesn't care. The most brazen ones simply fill up a large sportsbag or similar, then just leave. They don't care if someone spots them, they win

1) many thieves doesn't care. The most brazen ones simply fill up a large sportsbag or similar, then just leave. They don't care if someone spots them, they win on signalling pure aggression and implicit threat of "if you try to stop me I will hurt you". We have that problem at our local food store - three guys come in, one holds the bag, one stuffs it with all the expensive meat, the third stares aggressively on any bystander. Then they just walk out of there. 2) doesn't matter as long as what they have is valuable and can be sold on easily. The thieves are not opening a store on their own.