twingeofregret It's kind of tedious to add sites to the personalized results settings
Just to double check, the method you're calling tedious is clicking the shield icon in the search results page?
In other words, I don't think the proposed function would add all that much as all it appears to accomplish is move the process of blocking the site one step earlier (blocking it before returning to the results page instead of after). This case assumes you're returning to the results page because you haven't yet found the information you're looking for.