I'm not sure if this is intentional behavior or a bug but blocking a website simply hides the result on the users end and no additional search result takes it's place. This is problematic because if you block all the major news sites like CNN.com, FoxNews.com, BBC.com, etc that are covering a major story, you have a bunch of sites deleted off your search results with no smaller news sites to take their place.
Steps to reproduce:
Block a website.
Expected behavior:
A new website should take it's place in search result instead of reducing search result from say 14 links to 13 links.