Re: "Some think AIs should be given legal personhood"
I don't think "Personhood" was intended to conjure up a "Data" from Star Trek type analogy. More a boring legal position of can you sue it or claim against it...as opposed to its owner, or its manufacturer, or the reseller etc.
It can be a bit of a minefield, as demonstrated by the occasional mishap with self driving vehicles in the US of A.