In your eve control panel, go to Eve>>Members>>Member Management. Search for the member(s) that you wish to add to the group. Check the box next to each member you wish to add. Under "Desired Action", select "Add to Power Group". A menu will appear with a list of available power groups. Choose the appropriate group, and then click the "Submit" button. Note that you can also add a member to a group via their Personal Zone page. Look for the Groups link on the left.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .