Since Privnote is meant to be a one to one privnate communication tool
between people that trust each other, there is nothing to be gained if
copying is blocked but the loose of a needed functionality for some
users. Moreover, and in any case, nobody could prevent the recipient
of the note from taking a screen capture or even memorizing the note.
Privnote only blocks any further use of the URL link to the note’s
content after it’s used once.