If you've ever blocked someone from your Gtalk list, you'll have this circle already present. But if you've never felt the need to so far, Google+ might actu*ally evoke that latent instinct.

To create a blocked circle, simply select the people or person you want to block and click the "More actions" dropdown menu at the right Quake III days, who know you as noobJrager123, to discover you, here is a simple way