Here's the problem. We have a clear cut case study of this ideological position. You know where?
Haiti.
Haiti has an extensive squatter rights laws. If you leave your home, and someone comes and claims it, it is virtually impossible to remove them.
This is just pointing out the stupidity of Haitian law. If your house is invaded and you are kicked to the curb, then you could make the case that that was an unreasonable hostile action taken against you.
That is not really what we are talking about either. The city I live in has hundreds of abandoned buildings that have been that way for decades, but if a group of people try to take them as a squat, they get driven out by the police. There are realtors that have owned thousands of acres of land for ages that nobody is allowed to create a livelihood on.
Obviously there is a fine line between squatting in an abandoned building and being a bunch of douche bags that seize someones home while they are away. You are a big boy, so learn to start solving minor civil disputes using your general principles.
Squatter rights, is a great way to damage your entire society. Why would I ever build anything, if a squatter can just claim it?
Actually squatter rights are working quite well in most American cities that have them. Squatters usually renovate the buildings they are in and maintain them for long periods of time, and pay the taxes that would normally paid were the building operational to the city. This is a win-win-win-win for the squatters, realtors, community, and city government.
The idea is that if you are going to build something, you had better planned on using it. If you are not using it, then you cannot fault an element of society that will.