Huddle allows mobile Google+ users to text with groups from their Google+ circles. By default, anyone on Google+ can start a Huddle with you, here’s how to trim that down.
1. Go to Google+ on your computer and login to your account.
2. Go to the upper-right corner of the page and click the Options icon.
3. Select Google+ settings.
4. Scroll to the bottom of the page to the Huddles section.
5. Where it says Who can start a huddle with me, click the dropdown button and select the desired setting. Choices are Anyone, Extended Circles, and Circles.
