Ain't gonna happen, as it goes against the very core business model of Facebook. Facebook literally makes money by making spammers pay them to shove spam into your feed.
(They've also managed to successfully blur the line between spam and ham, and made it trivial to accidentally subscribe oneself to spam.)
Exactly. Facebook has to ride the edge of showing people stuff that winds them up enough that they engage, but not so inflammatory that they quit the site or become abusive.
(They've also managed to successfully blur the line between spam and ham, and made it trivial to accidentally subscribe oneself to spam.)