Of course the appropriate attitude is - fuck 'em. Copyright infringement like that isn’t hurting anyone, least of all the rightsholder. Oh no, your poor revenue stream, interrupted by one screenshot from a two-hour movie getting a zillion captions. Oh no, what if someone somewhere hears a fifty-year-old song and the writer doesn’t get their half-pence in royalties? Well, the writer’s family. Well, the recording cartel that manages their catalog. But the ha’penny!