Ex-librarian you say? I feel like such a dupe for supporting her actions and believing in climate change.
"That extreme", she threw some orange confetti. That JSO, Extinction Rebellion, Insulate Britain et. al. have a somewhat comfy, middle class support base and how this creates some inherent contradictions, has been a glaringly obvious observation forever, even amongst supportive voices. Of course this latest "gotcha" piece is meant for the dribbling troglodyte demographic that hate libraries, to give them another banal point to gum up the debate.
As for measuring one persons actions against another in the moral profit/loss calculator. I would say that flying in a plane is not worse than being George Osborne and neither does flying in a plane deplete ones morality reserve sufficiently to prevent them from being justified in throwing orange bits of paper at George Osborne. Hell, someone could pour agent orange over Georgie boy and his family every day for the rest of his life and Osborne would still be in the red.