Yep...and that is the problem.
It's all in how you perceive things.
For example, lets take a post on a message board. It's a person detailing how he had a bad experience with customer service at the Dome...how the employees working the ticket office were not as knowledgeable as they could be, and how this customer was also ticked off at a service charge on season tickets. This person finishes his post by saying these things were the last straw, and that he would not be purchasing his season tickets for the first time in 5 years. Or a post about how an autograph session could have been run better. Or a post about how the fans like the media having access to practices because it facilitates discussion about the team and promotes hope for another upcoming season. Or how some would have liked a recruiting event of some sort to learn about & become invested in the newer players on the team. Etc.
The person who seeks out that information, is grateful for being informed of the customer's experience (even if, especially if, bad experience), works to make employees aware of this valuable customer feedback on how they can deliver the best customer service possible and then acts on how to improve on those processes going forward will have MUCH GREATER SUCCESS than the person who reads this, rolls their eyes, passes it off as "just another negative person...we don't need negative people as customers" and hopes other employees don't see it.