Australian "anti-landlord" activists are sharing information on empty properties across the country for squatters to take over and potentially steal the deeds from their original owners. Jordie van den Berg, also known as "PurplePingers," has been posting the addresses of homes he has staked out in Victoria, New South Wales, and Tasmania. Van den Berg
I think Roman slavery was usually like a contract thing. You're enslaved for x months/years and these are the kinds of things you can be expected to do.
Not an expert though.
That's Nexum, possibly. Slaves taken in pirate raids or as war booty were slaves for life, as were vernae. They could achieve freedom by various means, but it was not assumed or an inherent part of the process.