You need to null out idiots. They're everywhere as part of the noise, and cannot be eliminated.
You can't null the idiots, which is why we have to have so many regulations on roads and vehicles. Once you add safety features the flying lawn mower, they lose the ability to fly. I'm sure you understand the basics of physics and weight limitations for lift.
Wind gusts-- yep, need stabilizers. But we deal with black ice, snow, and have to dodge stuff with cars, like the dog that ran out into the road in front of me, this morning.
These flying lawn mowers are skimming 10-15 ft above surface, reaction time in wind requires a hell of a lot more than simple stabilizers. 0 for 2 on Science, lets see how bad you really are.
Your Edward Scissors-Hand thinking is a bit goofy. In urban environments, we're running out of space close to ground, because we can't convince people to take public transportation, although much of public transportation lacks convenience.
And you won't convince many people that an open deck flying platform with little to no weight bearing capability is better than the bus. These things will cost huge amounts of money to "drive", get insanely poor mileage, and be extremely expensive to insure. This is not the car we see in the Movies, this is a small flying drone with humans as the casualty. In terms of Science, you just struck out.
Will stuff fall out of the sky? Probably. Will we sue the living hell out of people that do this? Yep.
As mentioned above, they would have to have insurance. Insurance for these would be insanely high. This is a product that few people could afford to use, let alone would bother using.
The early adopters will be the super-rich. If you look at SillyCon Valley, they pay jaw-dropping amounts of money for simple housing, so a flying drone car that gets them over the 101 to their offices filled with barristas and pool tables is a no-brainer.
Yeah, and it'll stay that way until we have an actual flying car (which this is not). Reality. You should see if you can find some.