Go to LW's menu bar, Tools>Options>Sharing & disable all options & remove any shared folders listed. Then go to Tools>Options>Uploads>Basic & disable Partial file sharing.

If nobody shared, there's be nothing at all for anybody to download. So people who share many thousands of files might feel a little off put by that but people have their own reasons for such decisions. Freeloading is thought of by some people as being greedy & selfish since it breaks the community understanding of sharing p2p (from peer to peer).