It seems to me that, somewhat like adultery, most people treat infringement against their property as threat to some stone age survival instinct. We can hear it

It seems to me that, somewhat like adultery, most people treat infringement against their property as threat to some stone age survival instinct. We can hear it when a small child shouts "MINE!" and see it in the cumbersome hoards of garbage some homeless people drag around. I doubt a post-scarcity society will be able to coolly regard all stuff as ephemeral and fungible; we'll still defend our stuff vigorously only there will be more of it. This is why "infringement is theft" arguments are so manipulative and dishonest. They try to tap into this indignation rather than win the debate on the merits.