I switched over to active moderating of comments on TDA Training because I could have more control of what was posted (offensive, etc.). Another reason was to avoid link spam (I can't remember the other term for that). Here's another reason:
From
Internet.com - The Network for Technology Professionals
Spammers Hit MobileMe, Google Blogspots
By Richard Adhikari
October 30, 2008
With new automated tools to help them,
spammers are getting better at cracking CAPTCHA -- a program that protects Web sites by generating and grading tests that humans can pass but computers cannot, according to the MessageLabs Intelligence Report today.
One breach has resulted in fake blogs on Google's Blogger division, which may contain malicious code.
CAPTCHA -- short for "Completely Automated Public Turing test to tell Computers and Humans Apart" -- is used by many Web sites, including Google (NASDAQ: GOOG) and the Facebook social networking site, to protect their users.
By requiring visitors to enter distorted text into a Web form, it creates a bottleneck to mass mailings, thus making spamming unprofitable for cybercriminals.
Now they can crack CAPTCHA easily, spammers can get mass responses to their spams. They are posting blogs on Google Blogger that redirect victims to their own sites, and using fake Apple (NASDAQ: APPL) MobileMe accounts to send spam, according to MessageLabs, which provides messaging and Web security services.
Read the rest. Any thoughts on this subject?