I think there's an option to lock a thread so nobody can post in it, but it will still show up as a sticky.
And WMP writes information like number of plays, artist, rating, all that annoying stuff nobody except WMP cares about, etc. to the MP3 file. Annoying, I know, which is why we listen to MP3s by looking at the binary file, decoding it to waves and just move the magnets ourselfves.
er....something.