CAPTCHAs are overused because of groupthink and fashions/fads. Before you use a CAPTCHA of any kind, consider very carefully if you really need one.
I've seen this a number of times in design meetings: someone will say "oh, an account registration form, we will of course need a CAPTCHA there", everyone will nod their heads and move on. In reality, in most of those cases, no one will ever conceivably even try to automate/script the thing being designed.
I've seen this a number of times in design meetings: someone will say "oh, an account registration form, we will of course need a CAPTCHA there", everyone will nod their heads and move on. In reality, in most of those cases, no one will ever conceivably even try to automate/script the thing being designed.