Zeynep Tufekci:

It’s important to realize that, in using these dark posts, the Trump campaign wasn’t deviantly weaponizing an innocent tool. It was simply using Facebook exactly as it was designed to be used. The campaign did it cheaply, with Facebook staffers assisting right there in the office, as the tech company does for most large advertisers and political campaigns. Who cares where the speech comes from or what it does, as long as people see the ads? The rest is not Facebook’s department.

Almost like these tools are the assault weapons used by politicians and advertisers.