We've got an app that uses Yahoo Audio Search to gather information about songs and artists. We also use it to pull album art. Unfortunately right now all the album art is either broken links or random images from around the web. As a result we started showing junk images to our users--and one of them was pornographic! I don't know if anybody is trying to fix this problem but they certainly should be!
Please fix this ASAP. In the mean time I am moving to another provider for metadata (Discogs)
We are working on removing the pr0n queries. On a related note, the audio search API is being discontinued on October 15. After that date any queries will return an error.