The Law of Gravity

Have you ever sat and thought about something so random as this...

I've had this reoccurring thought recently and I have no idea why, but as we were driving to Sydney over Easter I thought to myself - "How important is gravity to our modern societies concept of law?". So over the past few weeks I have continued to ponder this thought. I seem to recall a car on the side of the road and thinking something like "once we have cars that can fly or vertical cities like the ones in star wars and other such fantasy worlds will we have to change the laws we have now? At the moment if you own a car, you can park it in your driveway or garage and people know its your because its on your property and its our friend gravity that is keeping where you parked it. But imagine with no gravity, you bounce or float out of your car, close the door and make your way inside, only to notice sometime later your car floating by your window, with your neighbours with it - just floating around. I'm sure there won't be too much of an issue in the local area but what about if you visit a friend in another part of town and you have to find your car - you could just claim another one? On reflection cars are not the best example, they have number plates etc so lets think about pot plants or other non-identified house hold items. We have heaps of pot plants around the outside of our house what if they just floated away and we had to fetch them? People know they are ours at the moment, because they are at our house. Not sure what you think, but I am sure that there is a strong link between the law of gravity and the law of common society and possession.