It's a good time to be skeptical because governments plant propoganda using social media or friendly press outlets. Certainly, a recent story on RT News, a press organ for Putin and the Russian Government, comes to mind. That story featured suitably large, fake Greek coins that were purportedly being sold by a rebel from the Free Syrian Army to help purchase weapons. Russia, of course, supports Assad, the enemy of the Free Syrian Army, so one should be skeptical about a report that portrays these rebels in a bad light.
And what of the vast sums of money ISIS supposedly makes from the illicit antiquities trade? Even some in the archaeological lobby are rightly skeptical too.