When I tried all of my possible password combinations before resetting it, I found the CAPTCHA system here really aggravating since there are a lot of 3-5mm lines covering like 2-3 of a couple letters and had to refresh it several times for one that was legible,

While registering for another site, and they used this: http://areyouahuman.com/site-owners/playthru/ no matter how amazing character recognition can get (I've seen jdownloader punch through hundreds of megaupload downloads in queue and asked me for help once in years) it won't hold a candle to areyouahuman since it's an html 5 (I'm assuming since there's no typical flash right click menu, but instead image-saving option) game, There are tons of different ones all different and should take 5 secs tops to drag everything around

Here's a link to their demo page
http://areyouahuman.com/demo-playthru/

Steam, it would be something to consider, not sure if it would work with the client but the website would support it.

-Chiibit