You can block a person on Google+ to avoid annoying notifications, prevent them from commenting on posts or to stop seeing their posts appear in new items.
Sign in to Google+.
Open the Google+ profile page of the person you want to block.
Click the arrow below the person's name.
Click on the option ' Mute + that person's name '.
Next, select ' Mute ' on the confirmation request.
When you choose so, you will no longer receive notifications when this person chooses to like ( +1 ) your post, or share content with you.
Alternatively, you can block that person from commenting on your post by selecting ' Report / block + the name of the person you want to block .'
Among the options that appear, check the ' Block + person's name ' option. If you want, you can remove that person from your ' Circles '. Click ' Done ' to finish.