This is a bit of a tangent topic, but relates to this forum.
Many SEO companies try to post in an attempt to gain business from the huge number of people who visit this forum. Many try to gain backlinks and/or marketing by posting as one user ID and then answering with another. Other attempts to gain marketing and/or backlinks are done by posting a comment or question that indicates they poster is being told something by "company X" that does "Y" and they need to know if this makes sense. It often is written in a way that does make sense with "Company X" actually being the company they are promoting.
In the first example, the person is playing naive in order to get the link/marketing. In the second method, the person is likely lying in that they weren't asked a question at all.
My questions are - would you consider these SEO marketing tactics unethical? Would you hire a company doing this type of promotion?
As a note - The moderators and power users on this forum are very good at identifying these situations on the forum. Such posts generally result in the posters being banned and often their company names are censored.