There's a whole bunch of laws around this that I've no idea the details of, and that mostly seem to be related to not-quite-this idea. I think the key point is

There's a whole bunch of laws around this that I've no idea the details of, and that mostly seem to be related to not-quite-this idea. I think the key point is the difference between possession and ownership. My layman impression is that you have to pay damages of equal value.