I remember science bloggers complaining that the recent IPCC report didn’t predict enough doom and gloom to get political results.
They may well be right, but they weren’t saying that they had reason to believe the IPCC had understated the influence carbon dioxide, methane, or some other gas has on the climate, or that predicted emissions where wrong, etc. They were complaining that the report didn’t have enough scare mongering. That’s not science, and it could easily lead to a big overcorrection in a few years.