Global Site Tags Blog Restriction Option?

I really think the Global Site Tags plugin is wonderful. Thanks for the work! Quick question:

Is there a way to restrict certain blogs from qualifying for the global site tags option? Essentially, I would like to generate a number of blogs within the network that will be private and not contribute to the global site tags. This way, those private posts won't show up in the list of posts underneath that particular category or tag when the general user clicks it in the cloud.

Thanks in advance for any help!