Comment by shortstuffsushi

There are levels to this though.

You wouldn't hold a landlord accountable if it was a surprise that a crime took place, but if they were aware that some of their tenants were committing crimes and just "choosing not to ask about it," they could reasonably be called "accountable."

Telcos are regularly asked to give up information regarding crimes committed by their customers, see the Patriot Act for details - in some sense, we as a country have decided to hold them accountable for this (though, not spam).

Meta have been involved in a whole list of litigation that is at minimum adjacent to stalking/harassment, if not directly involving those things. I would need to look up to be more specific, though.