Most likely the drones in question are camera drones only, just small nuisance things flown by people who are either just taking pictures or videos of other people as in an invasion of privacy. Some ranchers out here use them to monitor their herds but get very upset when some city hunter fly's them over their land to chase deer towards their stands, which is also illegal to do. Our county sheriff says shoot the things down if one happens to fly over and no one has been warned of there being one flying across your property by a rancher to another of his properties.
I doubt a net gun with such a limited range would be very effective except in a suburban setting where someone is flying it over their neighbor's backyard hoping to take pictures of the neighbor's wife or daughter lounging by the pool