I literally was thinking about a hide feature and was excited when I saw this Idea.
Thank you @TripleYoThreat for starting the discussion!
Since I use Evernote to store sensitive information (thank you for offering SSL encryption!) it would be extremely useful to "hide" notes and have the ability to include or exclude "hidden" notes from searches and from displaying in notebooks or in the All Notes view.
I understand we could use tags but, similar to hiding image files in the Photos app for iPhone or Mac, it would be great to be able to exclude or include based on a "hidden" attribute on the note.
@DTLow thank you for continuing to providing possible solutions to the ideas presented in this forum!