class AbstractScraper
    def initialize
        @agent = WWW::Mechanize.new
        @agent.user_agent_alias = "Windows Mozilla"
        @agent.keep_alive = false
    end
end

class AuthenticatedScraper < AbstractScraper
    def initialize(username, password)
        super()
        login(username, password)
    end
end

class NormalAScraper < AbstractScraper; end
class NormalBScraper < AbstractScraper; end

class GoofyScraper < AuthenticatedScraper
    def initialize
        super()
        login # apparently login takes *args?
    end
end