Comment spam is definitely something a lot of bloggers encounter, no matter how few or many people visit. Some are geniune spammers, some are newbies who do not know any better, and some are just plain out of the loop. Yeah, that was not very nice, but hey – it is true.
Obviously if a comment is about selling something not even closely relevant to your site is flat out spam. Comment spam focuses mainly on comments that are not relevant to the blog or may seem like it in a way to get a backlink.
Example: “Your site is nice” by Deidre (who has a url attached to that anchor text to a Viagra site. Name is just random for this example.)
The problem is that regular people also may just leave such comments too. The key is to looking into your posts and making sure that it is relevant. Obviously if someone said “your site is nice” in a blog post such as this, it is not relevant and should not be approved, whereas if the blog post is about the site itself, then the comment would be more appropriate.
Occasionally I have a people leave a comments to smear campaigns toward certain popular and influential people on a post that was unrelated to what they had to say.. Though I am not sure if it was a sock puppet of the real blogger (a person under another pseudonym), it was marked as spam.
It is important to moderate comments to keep the topic on track and make sure your visitors are not confused. In allowing comment spam, you could be deterring potential comments from new or regular visitors because it detracts from the value of your blog.
For the commenter, this is not conducive to their blogging platform, and in the case of WordPress, the content management system picks up the comment as trackback and it has no real value. Taking care of comment spam is as simple as looking through comments and especially through most blog platforms, you can mass delete spam. Even though there are plugins to help weed through spam, there will always be a few that get through, so it is important to keep on top of them.
Of course, there are plugin you can use to reduce spam, but there are some that will slip through those cracks.
What kind of comment spam have you gotten? How do you take care of it? Any interesting comment spam experiences?