"I walk into a coffee shop and 'find' an unattended laptop sitting on one of the tables, so I decide to close it up and take it home with me." Nobody I've talk

"I walk into a coffee shop and 'find' an unattended laptop sitting on one of the tables, so I decide to close it up and take it home with me." Nobody I've talked to seems to think that this scenario is okay or would consider the laptop "lost".