That is a terribly dangerous viewpoint, and it demonstrates how your lack of desire in exploring those topics in depth render you ability to propose and judge laws and policies with regard to ownership of property somewhat handicapped.
It's not dangerous if my property remains contained within the defined boundaries. It may be dangerous if it is not. I'm in the politics and society section. We're mainly speaking of philosophies. It would appear your muddying the two.
Discussion of politics requires acknowledgement of the effects that society has on its future. How could you claim otherwise? This forum is not entitled "Philosophy". Just because your ideology hinges upon ignoring the messy details of the real world does not in fact render you immune from such criticisms about your ideology.
Now, regarding this claim of yours:
It's not dangerous if my property remains contained within the defined boundaries.
I suspect you really don't know many of the things that you might do on your property that have an effect beyond the boundaries of your property. Furthermore, have you considered that boundaries do not exist just in physical extent, but temporal extent as well? What is the temporal extent of your ownership?
Ultimately, your ideology is short sighted due to your simplistic application of the meaning of ownership, which appears to be rather egocentric.