Hello!
I would suggest a new button to be added called "Untrusted files" or "Files I suspect to be malicious".
You can add this in the File Insight window (Norton Insight) where people can manually say this file is trusted or untrusted . The cloud could get this information and share it among all Norton users.
In addition to malware submissions to Symantec Securiry Response , this would be a good option to exchange opinions about malicious file / newly discovered threats