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A few short years ago, a viable positive vote bloc web-based application was available at votizen.com. (Votizen was acquired by causes.com, and all of it's stellar functionality and assets have since gone AWOL, AFAICT.) Hopefully*, within the next few months (optimistically assuming sufficient support 'appears'), a negative vote bloc, web-based application will be available, along the lines of the "Voter's Revenge" application that I have defined.