I've seen the plugins and I think AndrewP is doing a great job by providing the community with his QapTcha and Recaptcha plugins. His plugins aren't even that expensive ether and he seems like a really good programmer. I also think there should be more alternatives so that people have more to choose from.
But the thing is at the moment enabling the captcha within dolphin or disabling it makes very little difference and it hasn't been fixed or updated in a very long time. Problem is even if they did update or fix it, I'm sure it would probably be cracked within days.
I figure the only solution is to ether update it more often or provide the community with another captcha alternative. If I'm not mistaken, other scripts are already doing this or at least some of the scripts I have tried are.
It just seems sad that you have to buy other plugins or make changes to the script yourself to keep spammers from joining your site.
Dolphin 8 seems to be their top priority now so most new features and updates will probably only be seen when it finally comes out. A new Captcha being one of them as a ticket posted in the Track section 9 months ago would suggest.
My point was that the captcha in Dolphin has been cracked and it is useless against spam bots. It needs to be updated. Then again if it is updated it will be cracked anyway. So something else would have to be done. The only other solution is to add another captcha that requires you to connect to a 3rd party for it to work. That way the spammers can't just download the script, find the captcha code and create bots that bypass it(as they have done so far).
It's like a puzzle ... you have half of the puzzle, the 3rd party has the other half and the user has to put it together. With the Boonex Captcha you have the whole puzzle and the spammers have a copy of the puzzle so they know how to put it together. But it would make things more difficult for them if they didn't have access to the whole puzzle.
This isn't just meant for Dolphin 7, this is also meant for Dolphin 8 and above. If they don't do something about it the same thing will happen in future versions of Dolphin. So it wouldn't really matter which captcha was added as long as the spammers couldn't get their hands on all of the parts needed to make it work.