Thanks for the pointers - had found & used the "hostiles" list - now subs to thread to make sure of updates.

One other thing that these files seem to have in common is the "Browse Host" button is always greyed out as well - Is this just an indication that users have just deliberately not enabled sharing in Options/Sharing ?
Or would these users files not actually show up in a search? (Guess that makes more sense!)

Hope this makes some kinda sense - Haven't developed a LW variety of OCD about these files, just interested to learn more about the possibilities.