Despite the opinions presented until now I actually like the reCAPTCHA system. I like it mostly because I consider that it manages to solve two problems at once: verifying human identity and help digitalizes writings (For those of you who don’t know here is why it uses 2 words and not one : reCAPTCHA philosophy
So I encourage all of you to try passing the reCAPTCHA tests as often as you can because you are really helping a good cause.