You probably don’t need ReCAPTCHA
"Many developers vastly over-estimate the likelihood of customized spam."<p>I run 100s of small random low traffic low priority sites. Without some form of form control, the ALL get hit with customized and random other crap spam. I don't have decent experience with many things in life, but I can say this is one topic I have YEARS of experience with. I've never over-estimated the amount of any type of spam any form can get after being on the web for just a few months. Doesn't matter how big they are or what they do.<p>I'm not saying ReCAPTCHA is the only thing out there or even the best, but having an open form is just asking for trouble.