See what you made me do, Twitter? This is what happens when you opt people into unwanted emails and then don't have an API mechanism for unsubscribing.

disable_notifications.rb

  def disable_notifications!
    auth_url = "https://twitter.com/login"
    notifications_url = "https://twitter.com/settings/notifications"

    agent = Mechanize.new
    page = agent.get(auth_url)

    puts "DISABLING NOTIFICATIONS for #{self.username}"
    puts "Logging in..."
    page.forms_with(:action => 'https://twitter.com/sessions') do |forms|
      f = forms.first
      f.set_fields('session[username_or_email]' => self.username, 'session[password]' => self.password)
      page = agent.submit(f, f.buttons.first)
    end

    page = agent.get(notifications_url)
    
    puts "Updating notifications..."
    page.forms_with(:action => 'https://twitter.com/settings/notifications/update') do |forms|
      form = forms.first
     # uncheck ALL the boxes!
      form.checkboxes_with(:name => /^user/).each do |field|
        field.uncheck
      end

      page = agent.submit(form, form.buttons.first)
      puts "DONE"
    end

    nil
  end