Comments are a great way to build community and attract readers. Unfortunately for them often abused by spammers and other lowlifes, many of whom use scripts and other software to generate and send spam. If you received a comment that looked like an advertisement or a random link to unrelated sites, it was spam in the comments. Here are some ideas to reduce or stop comment spam on your website:
1. Use tools against spam in the comments.
Most development tools for sites, especially blogs tools can require commenters to prove that they are real, live people, not a bad system for spam. You have seen such things: the consumer usually appears distorted image (often called CAPTCHA) and he must enter the letters or numbers on it. Some CAPTCHA systems maintain and audio CAPTCHA. This is a pretty effective way to stop spam in the comments. This process can reduce the number of casual readers who leave comments, but will definitely improve the quality of comments.
2. Turn on comment moderation.
Moderation of comments means that the comments will appear on your site until they are reviewed and approved personally. This means you need to spend more time monitoring your comments, but will improve the practical work for site visitors. This approach is worth especially if you regularly post comments on controversial topics around which can unleash emotions. Usually, there is a setting in the software blog as WordPress.
3. Use the tag nofollow.
Google has rolled with Yahoo! and MSN (years ago) HTML nofollow microformat a few years ago and this attribute has been widely adopted. Each link attribute rel = “nofollow” will not be used to calculate PageRank or in determining how the page corresponds to the user’s search query. (For example, if a spammer include in your comments a similar connection: