Note: no doubt Dread & Wiggin for example will be eager to point out the apparent hypocrisy of objecting to these shenanigans when they're used to help Trump, while applauding them when they were used to help Obama. This is a common refrain and, when we know more details about the Obama campaigns' use of FB data and microtargeting, we may indeed find that they've been similarly dodgy. I have seen no evidence to suggest that those campaigns violated FB's ToS in the same way or to the same extent, or did anything that might be illegal.