Wordpress blogging software is probably one of the top most blogging software that has been used all over the world. It is probably the only blogging software that you can install on your website with an ease and in less time.
Looking at the huge popularity and its rank amongst the other blogging software such as blogger and typepad etc, the chances of exploitation of Wordpress blogging software is also equally huge; another thing that prompts the exploitation of Wordpress by spammers is the openness of the source application to everyone across the world.
Any spammer can easily create a blog with the help of Wordpress.com and will start spamming on websites using commenting feature of the blog. It becomes quite a mess for those websites or blogs that have good amount of visitors, as owners would daily have to delete plenty of spam comments. It hardly matters to those blog or websites that have low traffic, as the chances are very low for them to receive comments spam.
Those websites that have higher rank and popularity appreciate the anti spam tools big time, as these tools help them in tackling the situation.