Mark, but it's not a quite intrusive action simply change the favorite list of users?
Anyway, if this will be done, the action must be thinked very well. When (I mean, in which part of Unity loading) the icon will be changed? And if the user puts the nautilus.desktop icon on launcher again? Unity shouldn't modify it again. And probably there is some other points to think about.
Mark, but it's not a quite intrusive action simply change the favorite list of users?
Anyway, if this will be done, the action must be thinked very well. When (I mean, in which part of Unity loading) the icon will be changed? And if the user puts the nautilus.desktop icon on launcher again? Unity shouldn't modify it again. And probably there is some other points to think about.