When a file is shared to me by another user, the file-manager (e.g. Finder on OS X) indicates this by "extending" the overlay with the sharing icon.

But files I shared with other users or by link are not indicated at all (the upper file in the picture). Would it make sense to add such overlay icons?
Furthermore since desktop sharing has been introduced, imho it would be quite handy to have the possibility to see the shares in the desktop client as it can be on the server (Shared with you / Shared with others / Shared by link).