Stop SHOUTING

If you'd done a simple forum search, you would've found out that the 'shared LW tunes' playlist that you see in iTunes only shows if iTunes sharing is enabled within LW's options. If you didn't download LW then either someone else used your computer to download LW or you're on a LAN, connected to someone who has iTunes sharing enabled in their LW.

Tell whoever has LW installed to turn off iTunes sharing (tools > options > sharing > iTunes. Untick 'share my music' > Apply > ok) & you won't see that playlist any more.