I think it would be more of a hassle to set up each type of item as a separate option to recycle within the appliances. I'd actually prefer it if the Book Chute could be given pencils, books, and clipboards all in one go, much like the Toaster can be given toasters, hot plates, and cameras in one go. What you're suggesting involves more clicking on each appliance. Good for you, I suppose, but I expect this would annoy most others.
Not at all, I'm completely ok with handing them all over with one click, I just don't like that those particular items are scrapped at all (this also covers Longknife's post).
IMO a "junk" item is one that doesn't have any other use, except to sell. We don't even have the Rock-It Launcher anymore, so things like clipboards and books are effectively useless. Pencils are Pre-War money are mid-way - they're unusable but they're 0 weight, so they're decent to collect for sale, but nothing else. So, I don't really see why these somewhat usable items are being considered as junk. This also goes for Tin Plates, since these can be used in Meals-To-Metal. Basically, IMO if an item is used in any recipes they shouldn't be included in the scrap lists.