I read it, mac!
I just hid those icons also... however the Service Book do take up space on the BB, and can be deleted (Options > Advanced > Service Books). If explained correctly and point by point, your users might be able to delete them, and oh well as long as they don't delete the email service books, too.
I get your point, lol.
Nevermind, as Rosanne Rosanna Danna would say.