You are not altering it. Back pages are for "notes" Blank pages. . 2 pieces of tape can eas9ily be removed.
I found this:
A damaged passport is invalid and cannot be used for international travel.
How do I know if my passport is damaged?
According to the US government, a passport is considered damaged and may not be used if “The passport has been materially changed in physical appearance or composition, or contains a damaged, defective or otherwise nonfunctioning chip, or includes unauthorized changes, obliterations, entries or photographs, or has observable wear or tear that renders it unfit for use as a travel document, and the Department either takes possession of the passport or sends a written notice to the bearer.”You can do what you want but I would not chance a "hack" with ANY government issued document or property as it is pretty much NOT allowed.
Kind of like another poster suggesting to falsify the EHAS form, it could come back to haunt you in a big way. It is your choice but not something I would be promoting nor is it something that should be promoted here.