Dakota driveway alert systems come in two types, but neither really fits the use case in this thread.
The ones with a cable that you bury won’t detect people.
The Duty Cycle Probe Alert DCPA-4000 is a driveway alarm system that uses a magnetic probe that senses the change in magnetic field caused by large moving metal objects.
The ones like the one linked to at Amazon with the long rubber hose cannot be buried. You just lay them on top of the driveway so cars will drive over them. So they are really easy for an intruder not in a car to avoid, and for that matter, pretty easy to move out of the way. Beyond that, most of them are calibrated for a weight of more than 1000 pounds, for example, they won’t detect a bicycle.
Most other brands of Home driveway detection systems are similar. if they use pressure sensors, they are set for very heavy loads intentionally not to go off for people or animals.
If they use buried cables, again, they are looking for cars and are probably set for metallic detection of very large metal objects.
They’ll work for some use cases, particularly if you are trying to detect vehicles, but not if you just want to detect people trying to sneak into the yard.