The one part that struck me as genuinely evil is refusing to offer a guarantee about the data use. I realize internet companies all always hate offering info a

The one part that struck me as genuinely evil is refusing to offer a guarantee about the data use. I realize internet companies all always hate offering info about data use, much less binding agreements. But "let us and a third party touch and modify every single byte on your machine to use our product" is a gigantic ask, and deserves at least some good-faith effort to keep the results walled off from everything except security initiatives. Beyond that, the intent seems fine. I still think it's hubris, though - Facebook is ostensibly just a website, and attempting to remotely diagnose and treat malware is something they ought to acknowledge they're not going to do well.