[Edited/Updated as Much has changed over Time]
SumatraPDF 3.2 menu should show print as greyed out e.g Print … (denied) when security flag is set correctly
Such file should in FoxitReader Properties Security tab show as “Printing: Not Allowed”
In “commenting” mode, additions and other restrictions may be relaxed.
Both Foxit and SumatraPDF 3.3 pre-release can allow annotation and related actions including those affecting printing.
In such cases closing the file may require the password to confirm saving the modifications and again on reopening the file, Thus still respecting “User” rights.