If you choose to allow the program to run the control and to allow it to use persisted data, you do so at your own risk. ...

If you choose to allow the program to run the control and to allow it to use persisted data, you do so at your own risk. It is highly recommended that you not run ActiveX controls in documents that are submitted to you by people whom you do not know.  However, if you trust the source of the document and the individual or company who sent the file to you, then you can load the control and allow it to use persisted data.  However, this is no guarantee that the data associated with the control is actually safe to use.