Edit #5258089 has raised the issue how MusicBrainz should handle “XY’s Top 50” playlists or the like.
Bootleg torrents that are compilations based on playlists of charts authorities (like Billboard’s) should not be stored in MusicBrainz as releases. These playlists are often copyrighted by their issuers.
This has now been accepted. Therefore the “releases” representing such playlists should be removed from MusicBrainz, unless of course there are real compilations out there.
The logic behind this, is that these are not actual releases. The information they hold is just that of a playlist and releases are used as a hack to store this information in MusicBrainz. These “releases” clutter up the discography pages and might even get MB into trouble because of copyright issues.
I still have not found a good place to write this down in the wiki. Suggestions are welcome.