Only share the folders you wish to share. If you want to share these files then somebody browsing you shouldn't make any difference. eg: Perhaps you have a song they are after, & they might want to find out if you have more songs by that artist. Browsing is the easy way of doing it.
If you don't want to share your Shared folder where you downld your files, then take that file off the share list. Go to LW's Library window & select that folder. Then go to File>Stop Sharing |