Thank you kindly Vicky for bringing back this wonderful post. I was not on Givnology at the time this was posted, and although I look at a lot of older posts somehow I missed this.
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 .