Security - We will get there

I used to have a lot of trouble to deal with spam when I first opened comment to any visitors, it forced me eventually turned off that feature of my site several years ago.

But I do want to have more user interaction for this site and finally the service Mollom comes to help. You can check out How Mollom Works but here is some brief introduction for your convenience:

Mollom is a web service that analyzes the quality of content posted to websites. This includes comments, contact-form messages, blogs, forum posts, etc. Mollom specifically tries to determine whether this content is unwanted - i.e. "spam" - or desirable - i.e. "ham." Websites that allow visitors to contribute or post comments are constantly being flooded with inappropriate, distracting or even illegal commercial messages, many of which are uploaded by automatic "spambots." Mollom screens all contributions before they are posted to participating websites. 

Websites using Mollom send data they want checked to mollom.com, and Mollom replies with either a spam or ham classification. If Mollom is not certain, it will return an "unsure," typically prompting websites to ask Mollom's CAPTCHA server for an audio or visual CAPTCHA challenge to present to the user.

I just hooked up with this great service and now I can enjoy the reopening of visitor commenting while keep peace in mind that spam is taken card of by the magic behind the scene.

I found the free service is good enough for this site but they do have enterprise version just in case you want to pay small fee to make your boss happy.

Thanks Mollom.