mirandakatz writes: If you're a stock music composer, you sign over the rights to whatever music you put up on a variety of hosting sites. That can get complicated -- especially when your music winds up being used to soundtrack hate speech. At Backchannel, Pippa Biddle dives into the knotty world of stock music, writing that stock music is 'a quick way for a talented musician to make a small buck. But there's a hidden cost: You lose control over where your work ends up. In hundreds, if not thousands, of cases, a tune becomes the backing track to hate speech or violent videos. Often such use violates the license the buyer agrees to when purchasing the track. But nobody reads the licenses -- and, more importantly, no one enforces them.'