> On the one hand, I suspect this type of crime is more the realm of opportunists rather than hard-core criminals who would exact revenge.
Eh, somewhere in between. Back when I lived in Oakland (where there was/is a serious package theft problem) everyone in the neighborhood knew who stole folks’ deliveries (camera systems are basically free these days). It happened daily and the cops were too busy fending off corruption and sex trafficking scandals to give a damn. 20% of the time it was some high schooler and you would yell at their parents and get your shit back. 80% of the time it was semi-organized teams of people from a few towns over who would roll up to the end of the street in plate-less cars and drop a couple dudes off on foot. Dudes on foot would walk down the street and grab packages off people’s porches while the car would drive up to the next intersection. Dudes hop in the car, car hits the freeway and is in another city (and soon County) in no time.
Definitely intentional crimes (these things take planning, including networks to fence the stolen goods), but if you yell at them they just move on the next house without retailiating. The second you start harrasing people and causing a ruckus the police have fewer excuses to ignore the issue, and your easy source of cash is gone.