You now have the ability to Unsubscribe a User and stop them from receiving a Broadcast message from your organization. This will end all communication to the user account.
To Unsubscribe a user follow these steps
Go to Dashboard
Look Up Account
Click Roles
Uncheck the Send Email box
Click the trash can icon for the Subscribers Role
Close
NOTE: You can not remove a user from the Registered Users role. They created an account and became a Registered User and will always have that account.