Below is a couple of examples of comment spam.
I was going to write a similar blog concerning this topic, you beat me to it. You did a nice job! Thanks and I well add your RSS to our blogs. Thanks so much, Jon B.
The way you have described this is very thorough. I will link your blog page to mine.
Thanks for posting this, reading your blog I’m amazed how much time you have put into it.
Posts like this are what make the internet great, thanks for sharing.
Great post, love the design of the site too.
Completely agree with your comments on this – thanks for taking the time to post.
I received the above comment spam on my website this week. These two comments could be posted to any blog article and seen as valid comments if you don’t know what is going on.
With comment spam I typically removed the link that is attached to the name (this is done in the backend of the blogging software) so that there isn’t a link to the website the spammer is trying to promote. I then edit their comment and note right in the comment that such and such a company is posting comment spam. In the case where the site has objectionable material and/or pictures I don’t post the domain.
If you own a blog and get “me to” or “good article” comment spam the best thing in my opinion is to do is either delete them or out them.
You should be careful not to commit comment spam yourself. When making comments I make sure I have read through the post, address by name the person who wrote the post, make a comment concerning some point they have made in the blog post, and then post a relevant article on my own blog and ask them to read it and give me feedback on it.
Most blog software by default adds a nofollow tag to comments which tells the search engines not to give any ranking weight to the outbound link. This was done to discourage comment spam. Quality comments will still get your click through traffic, ranking weight and Pagerank vote from blogger that turn off the nofollow tag, and even when the nofollow tag is applied to the link I think the search engines still give you some ranking weight.