I did put email verification OFF intentionally.

The captcha image used is "Re-captcha" one the best you can have and its not easily identified by spam bots.

Besides this, there are many security features working in the background which you wont notice but the spam bots will get blocked e.g. ASKIMET the best antispam plugin used all over the web on Wordpress blogs including mine to stop spam.

Till now, there are no spam bots on this forum and I hope wont be in future too.

I may enable Email activation later on.