My thoughts exactly.
I dont use any captcha or special questions.
I rely on other methods entirely. This mod being one of those methods.
I think the reg form should be as simple as possible.
I hate filling them out when i register anywhere so figure less is more.
I have not had a single bot get through in months.
Spam free forum and i owe it in part to quality mods like this.

Thanks for the feedback and suggestions, everyone.

I think the special questions work when they're images, and when you use the same one over and over again, with different answers from different or even the same images. I have quite a few questions like "how many round objects are in this picture?" Then I use a number of different pictures with different objects. Then I'll use the same picture for different question types. I read that XRumer and the like are comparing Human Verification Questions with global sites and comparing answers to similar questions (like what's 2+2? Terribly ineffective question, but I see it all the time) and easily getting through them. By generalizing a lot of my questions to different pictures, I hope to cut eliminate any effective comparisons.

Installed and it is working perfect with "KeyCAPTCHA"
I put 30 seconds. I will give you my feedback after few days :)

Thanks Kevin for the new idea

I installed it from 2 hours only and I received 106 emails in my inbox

Can I make the mod to send email if the time is more than 10 seconds and less than 30 seconds? because most of the emails I received was 1 second only !

I think that's a good idea - so you only have to get emails when it's possible that it stopped a human? I'm also going to implement some kind of way to discourage or prevent actual humans from submitting the form until enough time has elapsed, which will hopefully eliminate that concern.

Yes exactly
+
In last 24 hours there is 1 spam account registered in my forum

This only stops rapid registrations, i.e., spambots. It won't stop all spammers.

You'll also have to find the optimal duration for your site. I viewed all the emails for 4 sites over the weekend and settled on 25 seconds as optimal for me.

I've installed my new product in conjunction with yours. Not one single bot since yesterday. :-) Down from 150 daily. They can't even go thru registration so no email is sent

This is working great on 4.2 level patch 3

Stopped loads today since I installed it.

Still have to manually add the IP addresses to ban list, so that would be a great addition to this mod.

Good work.

Cheers

Sean.