I think I have a moral sense that the requirement to ask an author's permission before podcasting or remixing is different from creating fanworks from a professional source without permission.
I do too. Well, not "requirement" perhaps, but "courtesy". For me, the reason is that the fanfic author and I (the would-be remixer/podficcer) exist in the same general community, and the likelihood is high that they would come across my work. Just as I think it's polite not to shove fanfic in the faces of TPTB -- who may not want to know about it -- I think it's polite not to put one's fellow fans in the position of stumbling across remixes of their work as they're going about their normal day-to-day routine.
I realize even that's not completely logical, because I don't feel that one should ask permission before reviewing a work, even though of course the author might not want to stumble across a review that's not 100% positive. However, people do seem to take fanfic/remixes/etc more personally than reviews for the most part, so the extra layer of courtesy seems appropriate.
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I do too. Well, not "requirement" perhaps, but "courtesy". For me, the reason is that the fanfic author and I (the would-be remixer/podficcer) exist in the same general community, and the likelihood is high that they would come across my work. Just as I think it's polite not to shove fanfic in the faces of TPTB -- who may not want to know about it -- I think it's polite not to put one's fellow fans in the position of stumbling across remixes of their work as they're going about their normal day-to-day routine.
I realize even that's not completely logical, because I don't feel that one should ask permission before reviewing a work, even though of course the author might not want to stumble across a review that's not 100% positive. However, people do seem to take fanfic/remixes/etc more personally than reviews for the most part, so the extra layer of courtesy seems appropriate.