Heyo everyone:

My sister just walked into the room and just asked me if i use her system. when i told her no, she dragged me into her room and her iTunes somehow made a shared playlist with a few random files i downloaded.

we both run windows XP. She loves iTunes, i hate it, no offense to the Mac heads

That and we have Limewire obviously.

What the hell?

That's ok, though really you should not post in the mac section unless you're using a mac. lol That is iTunes sharing ability. You can disable it if you wish. Go to iTunes edit menu > Preferences > Sharing & disable the Share on local network option.
Alternatively your sister could disable the 1st option which is look for shared libraries. Or you could share with her selected playlists, etc.

LOTR:

Thanks dude. It made sense at the time to post here because it's a mac software piece. Better here than anywhere else.