This is a strategy to remove property owners. There was a reason that only property owners could initially vote. Now the person paying the mortgage, insurance and taxes must jump through hoops to take control of their property.
Also, do not let the utilities go unpaid and get turned off.
A few weeks ago I read about some owner having the utilities turned off and the squatters went to court, and some execrable judge ordered the owner to have the utilities turned back on and to pay the bills.