'Reasonable' is subjective, that's problem nr. 1

If someone else's subjective decision can bring you to court, you need to protect yourself with a log that you was home. Everyone in society would need to do this. That's problem 2.

It's even worse that someone else need to prove whether you was in your own home or not. How would a society like that look like? This is what I mean with incentives, its just terrible.