It would be possible to do that at browser level through extensions, for example there is one to filter out Pinterest results from search results. I wouldn't ho

It would be possible to do that at browser level through extensions, for example there is one to filter out Pinterest results from search results. I wouldn't however expect that potentially great feature to be natively available in Google search anytime soon, unless they made it as a analytics filled paid service and in a way that gave their advertisers and investors the power of circumventing it, that is, both plonk and unplonk as a service.