This is an amazing/terrifying report. Cambridge Analytica right at the epicentre as one would expect with highly politicised data abuse. A classic example of how the far-right now operate.
Trump is a proto-fascist who must be stopped, but I found the C4 report quite frustrating.
All campaigns target voters to the best of their ability. There's nothing illegal or wrong about that, in principle - it's the nature of politics. I find the idea of using advertising to
deter voters depressing and cynical but again it's not necessarily an offence. It becomes problemmatic when either:
1. The data used to micro-target voters is obtained by subterfuge, or illegally.
or
2. The adverts used to deter voters are blatant lies.
We already know that Facebook and Cambridge Analytica are culpable on the first point so, in that sense, the C4 report added nothing new. What we don't know is what Facebook has done to prevent similar abuse in future, because they have been less than transparent about it.
On the second point, the C4 News report was also hamstrung by Facebook's lack of transparency. Facebook will not publish the adverts so it's impossible to gauge how dishonest they were. I suspect they were misleading, bordering on outright lies, but the one example C4 cited (which used Clinton's comments about predatory young black men) seemed quite reasonable. If I wanted to deter black voters from voting for Clinton I might do the same thing.
The report was better when it came to providing evidence of the
effect of the campaign; the deflation of the black vote in some states was clearly a factor in the 2016 result.
However, the elephant in the room was Facebook and what it has (or has not) done to prevent misuse of user data and the integrity of political advertising since the last election.