1. Click Administration, Security
2. Open a security group
3. In the Group Privileges frame, select Records and click Options
4. On the Security Options frame in the Record Types frame, select Constituents
5. In the Constituent Privileges frame in the Media row, unmark View, Add, Edit, and Delete
6. Click OK
7. Save and close the security group
8. Repeat steps 2 through 7 for all security groups