left-struck parent
Hacking is not just authorised use of a system. Hacking and hacking techniques can apply to systems you fully own or systems which you are authorised to hack.
Hacking is using something in a way that the designer didn’t anticipate or intend on.
Adobe designed pdf to behave this way. Placing layers over text doesn’t remove the text from the file. They have a specific redaction feature for that purpose.
you telling me when I stick my pen up my nose I’m hacking it?
I would call that a hack, not a good one though.