File Filter

I was wondering if it would be possible to filter out files by their hash or other means. Lets say your doing a general search for a television show. The title is Jack's Place. Your only looking for a few files, they might not even be rare but you have so sift through all the other episodes of Jack's Place in order to find them. Would it be possible to create a feature where you could right click a file and select 'do not show in search results' or something to that effect? You might think it's trivial but if you were able to build up the filter over a period of weeks or months I think it would be ideal for finding exactly what you are looking for or content that is new. Any thoughts?

no takers? I was hoping an idea like this might be possible.