More to the point, it's something you don't do as a responsible marketer. The thing is, the rules are easily bendable, the tactics are highly tempting and the ethics are typically questioned. After all, what "harm" can it really do? Well, actually a lot -- and I have a fresh and unfortunate story to share with you about it.
To give some background: One of the main activities we do as a social media company is key influencer identification and blogger outreach. Our outreach efforts are always about approaching people on a personal level. In other words, asking for permission, being short and sweet about our agenda, and even apologizing up-front in the event our outreach is perceived as irrelevant to a blogger's interests and audience.

Recently, we came across an influential blog that posted about our client's product. But before we could start slapping high fives, the blogger made an additional post that specifically called out one of the commenters. Although the commenter in question had good intentions, clarifying some false statements made about the product, his enthusiasm took things to the point of spewing marketing jargon in his comment. Dead giveaway.

As one of the shark commenters clued into the chum, the blogger was inspired to do a little investigation. You know where it goes from here. What he easily found was the commenter in question was using a fake name with a standard email address. From there, the blogger not only identified the commenter as a marketer, but even discovered when he was hired.

So of course, he owed his readers a juicy post about this discovery. Today, that marketer was fired. And as many might agree to that being an over reaction, the reality is the marketer's company and client was dragged into a search engine index-able conversation among far more than a normal room full of people.

Could it quickly smolder out and go nowhere? Absolutely. Could it be dragged to other blogs, becoming the latest meat puppet case study in social marketing? Absolutely. So the harm, aside from possibly losing your job, is not only the potential of short-term brand damage - but also long-term search engine results associated with the brand, its' products, services, etc.

From my position, I understand how someone could be reasonably fired for this. At the same time, I believe this particular person simply made a naive mistake that blew up like a firecracker in a child's hand.

If he would have disclosed who he worked for up front, this all could have been avoided. In all fairness, the most obvious things are sometimes the hardest to see - and in the world of internet marketing, learning on the job is commonplace.

This just in (this post has been evolving throughout the day as I've written it): the marketer wrote an apology to the blogger today. The blogger responded by emailing an apology regarding the job loss, removing his original post about the client's product, and the post that called out the marketer as deceptive. Wow.

What is your take on this? How would you have respond as the blogger? How about the employer or client?

Anne Mitchell at Internet Patrol pulls Vonage's blog comment spamming punk card.

So yet again another company that can't resist the urge to go into blog comments without a thoughtful and authentic approach. Comment spamming is considered pure vile, so building on my "Resist The Temptation of Astroturfing Post", I'd like to offer some very straight forward ways to avoid this kind of mess that Mr. Kariolis has gotten Vonage into.

As you can see in Anne's links she points out Mr. Kariolis posted the exact same comments on Internet Patrol and DownloadSquad.

Mr. Kariolis Astroturf Trail:

1. Posting the Same Comment on Several Blogs. By definition and common sense, that's comment spamming.
2. No Link in Comment Name. When leaving the comment on Internet Patrol, Mr. Kariolis did not provide any link indentifying him with a company, blog, etc. Most comments allow you to put in your name, and then ask for an associated URL. If you don't have a blog or company website then link to your LinkedIn profile.
3. Disclosure. No where in his comments does he disclose that he is working for Vonage and can be a resource on this subject.
4. Newbie. Okay, here's the deal. Bloggers know who their regular commenters are. They know them intimately, and when someone new posts, like Mr. Kariolis and is clearly posting URLs in the comment to drive traffic to their own site - it's no brainer red flag for comment spam. Case in point, if you look at Mr. Kariolis' post on DownloadSquad you will see that the link from his name goes to his profile. He posted his comment on May 7th and look at what day he became a member:

Three Simple Ways to Be Transparent and Authentic and Avoid Astroturfing

1. Provide Full Disclosure in the Comment. Right up front Mr. Kariolis should state that he works for Vonage. This takes the edge off and let's you be transparent about what you're trying to communicate.
2. Contact the Blogger Directly Via Email Rather Than Leave a Comment Post. Mr. Kariolis could have emailed Anne directly stating clearly that he is with Vonage and appreciates her post, and provide a response. In the email state clearly that he is not a regular commenter, but does have a point of view on the story that he would like Anne to consider. Then it's up to Anne to update to her post with new insights, or she may even ask Mr. Kariolis to post his views in the comments area but to clearly call out that he is representing views from Vonage.
3. Be a Participant Before Hand. This takes planning, time and dedication. So if Vonage is serious about engaging in the online conversation about VOIP, they should have individuals that are active in the conversational community on an ongoing basis, so when an opportunity to discuss a competitor's news arises, they are not setting up new profiles on the same day they are commenting on it.