Spam is one of those things that should be avoided at all costs regardless of what it is. Search engines get smarter each and every day. They pick up every change that occurs on a website almost immediately so it is important to keep things on your site very clean or you could see it get pulled out of the search results very quickly. Comment spam can also have a very negative impact on your blog if a spammy comment should slip through any of the spam filters in place.
On many occasions you will receive the typical comment of someone reminding you that you have a nice post or great article. These do not really fall into the category of negative comments from a search ranking stand point but depending on what type of spam comment finds its way it can really set you back. Spam comments come in many shapes and sizes. Everything from get rich quick schemes to the typical ones you see every day in your email. Porn spam comments have been known to really be detrimental to a blogs ranking in the search engines. There was one incident where akismet spam tool let a porn spam comment slide through and that particular blog owner found their blog ranking very low in search rankings almost immediately. Once the comment was removed the blog bounced back to its original position but gave the blog owner a real scare.
If you own a blog you should always require each blog post comment to be reviewed before it is allowed to go live on your website. Imagine working so hard to build your online business to watch it go down from one spammy porn comment? It would be devastating. If you have always wondered if spam comments can kill your rankings in the search engines the answer is a big “maybe”. Have other blog and websites been hit with porn or spam comments in the past and are still alive? Probably. But I wouldn’t take the chance with your livelihood especially if you use your blog to put food on the table. Often time’s rankings don’t just bounce back and could take some time climbing back up the search ladder. Best to avoid the situation at all costs if possible.