Perfect for outside the US

I whitelisted my country, so real customers would never be bothered with a captcha. That cut down 90% of spam from even reaching the spam folder. Within a couple of weeks the spambots seemed to come to a realization and gave up on my site entirely. All without inconveniencing my customers in any way. Might not work so well in the US, where most of the spambots seem to reside.