I am a Christian web developer who have used the Google reCapitcha for spam detection on a few site I developed. I however recently came to be concerned of the fact that while usually a simple tick, the tool will bring in an image challenge whenever it has reasons to suspect the particular visitor. I from this te had to quite using it but it really there no way to configure it so it only uses the tick? I'd rather deal with the few spam that may subdue the tick challenge than have my site visitors deal with images the cleanness of which I can never be able to vouch for.