A lot of captcha uses always struck me as backward, like we want to prevent automation and make humans do work that programs could be doing. For example why ca

A lot of captcha uses always struck me as backward, like we want to prevent automation and make humans do work that programs could be doing. For example why can't I have a script log in and print out my boarding pass for me? Or what if I want to make some elaborate program where one of the steps is to make a new email account (not for spam, just automating setting up an email account.) Perhaps a big obstacle to the semantic web (where computerized agents schedule oil changes for you), are captchas and the general attitude that we only want humans using our websites.