Hide some playlists from iTunes

I have a lot of smart playlists in iTunes which I only need for syncing to my iPod touch and iPod Shuffle. These lists are often duplicates from other smart playlists but limited to an amount of songs. In Roon I’ll see all those “duplicate” playlists under the tracks. It would be great if I can tell Roon to hide/ignore particular playlists. If you don’t want to mess up the interface choose a special string which we can add to the playlist names, maybe “PlaylistName.ignore” or just with a dot (“PlaylistName.”). All list with that suffix will be ignored by Roon.