It's a great idea but it doesn't block images or advertisements from certain sites. uOrigin however does block a selected site very well but it blocks a lot of stuff you might not want blocked without some heavy configuration.
If this plugin could block everything associated with a certain domain name it would be a winner. I hope you can get it to that point and I will check back periodically. Thank you for your efforts. I know there is no reward in writing these plugins at best minimal so thanks again.