Public directories are a great resource for networking within an industry or region and will generate the most exposure for your members. However, not all organizations want to share their membership data with everyone. If your membership prefers networking as a benefit of membership, you can secure access based on active membership status. Or even lock down visibility to only the site administrators for complete privacy. 

And remind your members that they can opt out of the member directory at any time by the selections in their personal profile.