I do not know if it is the same with BearShare and Shareza but with WinMx it would remember source IPs for files. I have always reserved 80gb to share and I will move older files out and replace them with new ones. I use to see the file not found message allot when people were searching for files I had removed. But since you never had the files it probably doesn't apply to you unless the files in question match in size to something you have removed from your share file then it may be possible but I am not sure about that.