the police said the current MO is to follow the driver on his established route, and after he makes a drop and drives off, check the package to see if it has anything of value in it. walking out of a gate with a small mobo box, or with something that can fit in their pocket is way less suspicious/risky than a whole amazon box, that might only have a $10 book or two in it. if i were a thief, thats how id do it too...
I often leave things on the porch for their friends and family to stop over and grab, and never have a problem with them disappearing, but I also dont usually leave it in an over sized amazon box.
If what you said was true, it was an experienced thief, one who (A) might very well know that a CPU is more valuable than a motherboard, (B) would prefer it because a CPU box is much smaller than a mobo box, and (C) would want to take the most valuable item. Instead, he took the time and risk to breach your gate, slice open your box, rummage through it, and finally tidy up and conceal the package all over again after taking the bulkiest, least valuable item it contained. All that argues that he's actually stupid though considerate, like I said last time, not experienced. You choose to believe he did all that and took the bulkiest, most conspicuous item, when his goal was to take all that risk in order to avoid walking away with anything bulky, when the entire box would not have been that much larger, and it would have been lickety split to grab and run. Number one rule is not to get caught, and everything you believe he did maximizes his risk of getting caught.
I think what you believe is completely ridiculous, and it was either a simple mistake by the shipper, someone in the shipping chain, or a little brother or other acquaintance, and that's in decreasing order of likelihood. Out.