New York Attorney General Eric Schneiderman gave the game away when he explained that they would be pursuing completely different theories in different jurisdictions — some under pension laws, some consumer protection, some securities fraud. It is traditional, when a crime has actually been committed, to first establish that a crime has occurred, and then identify a perpetrator. When prosecutors start running that process backwards, it’s a pretty good sign that you’re looking at prosecutorial power run amok.

And that approaches certainty when attorneys general start sending subpoenas to think tanks that ExxonMobil might have supported. What exactly would the subpoena prove? That ExxonMobil supported opinions about climate change? That the opinions tended to be congruent with its own interests? That this opinion might have been wrong, and if so, might have encouraged wrong beliefs in others? This is a description of, roughly, every person or organization in the history of the world, not excluding attorneys general. It’s also not illegal. Especially since, as the New York Times points out, “the company published extensive research over decades that largely lined up with mainstream climatology.” This isn’t preventing consumers from buying into a Ponzi scheme; it’s an attempt to criminalize advocacy.

I support action on climate change for the same reason I buy homeowner’s, life and disability insurance: because the potential for catastrophe is large. But that doesn’t mean I’m entitled to drive people who disagree with me from the public square. Climate activists have an unfortunate tendency to try to do just that, trying to brand dissenters as the equivalent of Holocaust deniers.