Let us, in general, be thankful for unauthorised recordings. When we consider that the powers-that-be spend their days doing things like deleting Bob Dylan's "Mad House in Castle Street"(who'd be interested in that old stuff, eh?), it is a jolly good thing that various individual anarcho-recorders are out there. Though they weren't, alas, for Madhouse.
    Mind you, I'm also totally with Dick Miles in his irritation with some unauthorised or uncredited photographs/videos/sound recordings. It is the uncredited subsequent use that is particularly annoying. But, as Ralphie sagely pointed out earlier, maybe the best thing to do about things that are annoying is not to get annoyed by them. Difficult, but it's often the only option!