Something that adds to the confusion of 'squatters' is that there are all different types...

Some squatters creep into other peoples dwellings- like Kevin mentioned. This is just sickening to think of. What kind of person would feel so entitled?

Some build on land that is clearly someone else's. Not as sickening- but still completely intolerable.

Some find land that is not used, they're not in anyone's way and far from it, and they claim it. A little disturbing, but I can accept this.

and then there's the old school squatters... who that's just what they did- Find unused land and claim it. My grandfather obtained several hundreds of acres in rural Maine. He knew what land he could keep farming when no one else cared or bothered and kept farming the land. Eventually he paid taxes on the land and now its his. Of course- now a days its much harder to do as everything is more documented and previously claimed. But I can completely understand this happening back in the day and completely accept this.

The term RESPECT comes to mind. If one has respect for themselves, the land and everyone around them... I see no harm