I have recently applied a captcha method for commenting on this blog, via the means of this plugin.
The reason for doing so it’s not because I have too many comments but because I have too many spam comments. Over the past couple of days this has proved to work since I did not receive any spam at least for now and my spam count has gone down to zero, nothing, nada.
I think that wordpress should provide this option into the core, for anyone that would like to turn it on.
I know that some people argue that users don’t want to enter a captcha or can’t be bothered. My personal option is that if they can’t be bothered then they don’t want to be heart.
If you notice anything strange let me know.