Okular is doing the right thing. The PDF spec allows setting these flags and the PDF viewer should enforce the use of those flag. If someone has created content that sets these flags to restrict what you can do with the content, that's a problem with the content, not the viewer. Okular needs to continue to honor those flags. It would be hypocritical of us to expect people to honor our wishes (or licenses that we use for free software) yet not honor the wishes of those who choose to restrict their content.