| | Six Apart Guide to Combatting Comment Spam |
 | | For example, in a typical comment form, these variables contain data such as the text of the comment, the name of person submitting the comment, and the ID of the weblog entry associated with the comment. |
 | | The idea is that comments sent via your weblog comment forms will contain the necessary additional fields; comments sent using spamming software that only sends data corresponding to what's expected by the default mt-comments.cgi script will not. |
 | | One simplistic example would be to require commenters to answer a natural language question, such as "What is the last name of the author of this weblog?", or "Which month immediately precedes August?" The problem with this technique is that to be effective, the questions need to change frequently. |
| sixapart.com /pronet/comment_spam.html (6225 words) |