If a website doesn't want its content to be summarized by Google couldn't they just block it in their robots.txt? From what I've seen that results in Google listing the page's title but with no description.
Maybe search engines could adopt some sort of standard that would allow pages to provide their desired description using meta tags if they don't want an automated summary. I could see a problem with pages using dishonest summaries, but perhaps that could be addressed by penalizing the page rank if the provided summary is too different than the summary that Google would have generated.
Maybe search engines could adopt some sort of standard that would allow pages to provide their desired description using meta tags if they don't want an automated summary. I could see a problem with pages using dishonest summaries, but perhaps that could be addressed by penalizing the page rank if the provided summary is too different than the summary that Google would have generated.