Question Why Kunena is so weak to against spambots?

Hi,
This is how I protect (for now successfully) against spammers:
1. protect joomla user registration with reCaptcha (invisible): this will 'force' the spammers to do a manual action when registering
2. I have (my own) plugin ochStopDMR enabled ( extensions.joomla.org/extension/ochstopdmr/ ): This will stop spammers from registering with Disposable Emails
3. activitate users by sending activation link they need to click
4. install R-AntiSpam ( extensions.joomla.org/extension/r-antispam/ ): heuristics based spam detection for Kunena > works miracles and has an occasional false positive that can be easily corrected / learned from
5. set reCaptcha (invisible) for anonymous users when posting in Kunena
6. set a limit to the amount of URL's a post can have

This setup keeps my sites clear from spam accounts, and in the categories where visitors can also post they are prompted with the recaptcha and R-Antispam will catch the smart ones.

I host my sites with SiteGround, they automatically block IP-addresses they are known to try to hack / spam a site. They also use the experience from all their hosted sites, not only from my site. When they introduced this feature, directly the ddos / bot-logins where minimized to 0. I think the blocked spam-bot networks that are trying to login are potentially also the bots that send spam. So although I have no prove my gut feeling is that this will also limit the amount of spam... but: Kunena is also hosting at SiteGround and here on the forum is the daily amount of spam messages also worrying.

I use Cleantalk plugin for Joomla which has been a godsend and really effective on keeping out spam and such. It costs about $8 per year for 3 websites, which makes it a no brainer budget wise. In the past year I think we have had maybe 3 spammers get through and no bots. I have a fairly busy site with about 7,900 registered users, mainly on the forum. I don't get a kickback and am not affiliated with them, but do use the product on several sites with great results.

www.Yamaha-Enduros.com