Is this a good idea, legally? At first glance I'd say no, but a quick Google leads me to believe breaking captchas is just fine [1]. Could one be prosecuted under CFAA for this kind of thing? Maybe the weev case is throwing my mind for a loop, but it's hard to believe this is 100% legitimate.
[1]: http://jolt.law.harvard.edu/articles/pdf/v24/24HarvJLTech233...