I understand your point and had considered your distinction when posting. I agree they may have had a different experience.
However, I think those guys ought to be who is answering such emails. Any email that comes in discussing your business reputation is important enough for the boss or appropriate individual to handle. I can understand that people at that level can't sit around waiting for emails all day, so instead you have either an underling who can handle such issues correctly or underlings who forward you any such messages. Emails are a much accepted and time efficient method of communication. I don't think the poster would have posted this message if they received a reasonably interested response.