Yes, by journalists in the press, and perhaps by their opponents. But just because you sell billboard space, or ad space, doesn't mean you should be responsible

Yes, by journalists in the press, and perhaps by their opponents. But just because you sell billboard space, or ad space, doesn't mean you should be responsible for that fact checking. There's a reason newspapers would separate out advertising and editorial content and identify them as such. The counter argument typically is "but what if no one sees the countervailing message?!?" Shouldn't such a verdict be affixed to the message as a visual mark of sin or righteousness? Counter ideas with ideas, not imprimaturs. That said, I'd love to have a "No Tweet" litmus test for Presidential candidates. "I promise, when I'm President, that I will never personally tweet from my own account."