Was visiting World of Minecraft forums recently during the great Australian floods using my iPad. Typing the two words from captcha on a desk/laptop is one thing. Having to type the two words from captcha, plus being asked to copy and paste a long string of text, that captcha don't want you to copy, is another thing altogether. It just not tablet friendly. However I thing I have found something better as well as being tablet friendly. Anyway have a look and see what you think;

http://www.slashgear.com/ticketmaster-kicks-the-captcha-to-the-curb-30267418/