P: Locking smart collections to support global pre-filter and privacy.

I've heard several pleas for privacy, from a single check-box, to levels 1-5 like ratings, defining privacy metadata... This idea would cover all those cases and much more. I mean, maybe you want to let your girlfriend peruse without seeing pictures of your ex-girlfriend. Pictures may only be "private" in certain contexts. I prefer the term "discretionary viewing" instead of "privacy". My most frequent use would be to simply keep all the photos out of my face that I don't really want to see when I'm just generally navigating around... But, this idea can also be used as a more sophisticated global library filter - giving the power of smart collections as global library filter, but freeing up the handy library filters at the top to go with...

Reminder: Very little development time required to implement this - all pieces are already in place.

If you like this idea, please remember to click the '+1' button above - thanks.