Is there a word or means of expression for when someone complains about someone/something specific on social media (e.g. soon after a controversy), and someone else uses that complaint to air their preexisting grievances towards the subject that are only tangentially relevant with the discussion involving the subject at hand?
@star Close, thanks! But still not exactly descriptive of the following:
"The food agency is recalling lettuce because there have been recent food poisoning cases involving lettuce."
Reply: "I've always been suspicious about lettuce, it's insanely overrated." (-> no matter whether the incident actually proves the opinion in a general sense or not.)