People don't realize how much money that costs to do. You aren't just paying for someone to go out there an write citations (and they would have to be law enforcement officials, so most likely FAA inspectors or FBI agents who make a decent salary) but they have to be available for evidence collection (depositions) and to testify at trial, so it's a huge waste of resources that doesn't justify the cost. Make all the government waste jokes you want, most departments run on tight budgets and there is literally 0 appetite for wasting an FBI or overworked FAA inspectors time chasing an idiot in the park with a 3 channel foamie.
More than likely they will rely in local law enforcement to do the heavy lifting and even then, those departments really don't care for enforcing a law that isn't posing an immediate threat to safety and well being.
And keep in mind - It's not a violation if it isn't in the air. If you own it and never fly it then what can they really cite you for? You aren't "operating" anything unregistered if it is sitting in the box.
And those people will probably get fines (and I think there are impounds involved too by the way) now that it is back because you have law enforcement on the scene. I'm just saying it's hard enough to enforce full size aircraft and their N numbers are several feet big - a tiny little plane or copter? forget it.
Wanna know my concern? It isn't registration lists or fines for illegally flying - it's the rules about maintaining visual contact with the airplane at all times. Anybody who has been doing this a long time will eventually have an airplane fly away from them. It happens less and less frequently and the tech gets better but it's the nature of using the transmitters we use to fly - eventually something will interrupt the signal and the plane will fly away to usually never be seen again. Does that mean that if the FAA finds it with my name and number on it they can now prosecute me for failing to maintain visual flight? even if I was not at fault? Time will tell.
We had a guy at our club who had that very thing happen to him, and it was a worry for the club, in all actuality. He started flying his gas powered plane with a full tank, put the bird up in the air, and it was set on a light, lazy, upward spiral shortly after takeoff, when he lost control of it. No, it wasn't signal interference at all, as the plane didn't divert into another direction or anything. No, this was negligence on the pilot - he didn't check the battery levels on his battery controlling the servos.
So, with a full tank of gas, the plane climbed probably up to over 1000', which was clearly in FAA airspace at that point, over the next 40 minutes, until the motor ran out of fuel and it glided down to a landing some 6 miles away at a ranch. Now, fortunately, he had his information on the plane and the rancher contacted him and he recovered the plane, which was in one piece, believe it or not; but it was still a big worry that he could get a fine for his negligence, should a full size, small aircraft pilot cross into the same airspace (which is possible; we have Oceanside Municipal airport out to the west of our field, Palomar airport to the southwest, and Ramona airport to the east of us, where all sorts of small aircraft such as Cessnas, Beechrafts, Pipers, etc. fly in and out of. They're usually a couple thousand feet up, but when you have an airplane that was out of control and due to the pilot not doing a proper preflight check, you have to think, "Should they be liable to a fine?" I don't know. I'm not the right person to pass judgement on that situation; I just know that it CAN happen, it HAS happened, and it probably WILL happen again.
Where I think it's REALLY a problem is all the Christmas present drones that people are buying and will be taking out to various parks and trying to fly them without knowing how to fly, and more importantly, without knowing how to fly SAFELY, is where we need something - I don't know what. I don't know if it SHOULD be a license, or if it should be a minimum training class for these people on some of the basics - DON'T fly above people. DON'T fly where there are crowds. DON'T fly it where you can't see it. DO make sure your flight area is clear of obstructions for first time fliers, such as trees, power lines, people and pets. DO use a spotter to help keep an eye out for unintentional people/flying objects/birds encroaching in your flight area. And DO try to have fun in a safe manner.
For most of us, it's common sense, right? Fly safely without endangering others? But it doesn't seem to be for most people buying a drone, because they see them as a toy, not something that can slice and dice body parts like most of us know or have seen. I'm willing to help someone learn how to fly, but I think safety is first and foremost with something that can shred clothing, fingers, etc...we've all heard horror stories.