Board Thread:Support Requests - Getting Technical/@comment-25511580-20150218183449/@comment-1038387-20150220093514

Digifiend wrote: Personally I hate websites that autoplay music, and the music you mention is probably copyrighted, so you shouldn't upload it or you'll be violating the Wikia Terms of Use.

If it's an entire song and doesn't serve to illustrate something where no free version is available, it's definitely not fair use. And yes, autoplay is generally reviled as bad netiquette.