[rchaud]

Those two scenarios aren't mutually exclusive. One hand washes the other, the distinction is only between who gives the order and who carries it out.

[duxup]

I think you can have "legitimate ads".

I think plenty of people are happy to do illegitimate things with them too, and Facebook is as dirty as it gets, but that doesn't mean ads can't be fairly mutually exclusive from scams, fake news, and etc if someone wanted them to be.