I am running a blog using wordpress and for the past few days I am getting 100-200 spam comments daily. I am using Akismet plugin too and it is sending those spam comments automatically to the SPAM folder.
But the reason to ask for help here is that those comments are not normal, they are not being posted on any "blog post" but they are posted on 'images', see for yourself here - http://i.imgur.com/gTgNC.jpg
See on the right side where it says 'In Response To' - it is not a blog post but they are my blog images.
How can spammers comment on images where there is no option available to comment?
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If its a Wordpress blog then implement http://akismet.com/.
Its a free product from the same people that wrote Wordpress. It helps stop spam commenting by looking at the comment itself, who is posting it, IP address etc, installing it also helps the Askimet network protect other sites against spam too.
search for wordpress plugin called "Bad Behavior"
Bad Behavior is one of the Internet’s most trusted solutions for helping to prevent link spam and other malicious activity, from well-known sites to the smallest blogs.
hope this helps
Thanks Steve-Hostirian to share article related with disable image comments. Spam comment is a very big problem for most of the webmasters. It will help other people as well who are facing same problem.