Publishers that are investing significant amounts of money and resources in staffing newsrooms around the globe, technology in user experience and design, should be running to viewability, as it will almost certainly take out bad actors who have been infiltrating the industry.
The BUT here is that there are still large discrepancies between third parties measuring viewability. Some aren’t measuring mobile. Others aren’t measuring all browser types. It will get better though, and The Washington Post heralds this industry standard.