Add CAPTCHA option to the built-in Contact Form to prevent spam
In order to prevent automated spam from being submitted through Koken's built-in Contact Form widget, I suggest adding a CAPTCHA option, such as Google's reCAPTCHA (Developer's Guide). Providing CAPTCHA functionality greatly reduces spam received through the built-in Contact Form and the burden on the -typical- user is minimal: CAPTCHAs, on average, take 10 seconds to complete.
While I have a personal preference for reCAPTCHA due to its relative ease of use/implementation (and the creation of value argument) when compared to older based CAPTCHAs -which try to fool bots primarily by distorting words- any solid CAPTCHA solution will do as long as it provides: (1) support for the visually impaired, (2) support to render the CAPTCHA in multiple languages.
I look forward to hearing your thoughts on this suggestion and any experiences you may have with CAPTCHAs from a user friendliness/technical implementation point-of-view.