I was looking at adding Captcha to my login and contact forms when I saw this plugin -
http://extensions.joomla.org/extensions/access-&-security/site-access/2891/details
. Has anyone used it and was it worthwhile, particularly it's links to the Honey Pot database? Does it provide enough protection that you've found that Captcha isn't necessary? How much of an impact does it seem to have on your website's performance?
I have never heard of this before, so that's where the reviews left by users came into play. I suggest just trying it out and put it through a good test to see if you like it.