Jet Blue misinformation

Got this information today. Thought it was funny and in a way interesting. If you are flying JetBlue out of Sea-Tac and you are checking luggage, you will find yourself confronted with 2 lines. One line is typically very long, the other very short.

The majority of the people standing in the short line will tell you that the short line is for people who printed boarding passes from home. Don't listen to them, they are wrong.Both lines are exactly the same - except for length. With this information, you can skip ahead of all the poor saps waiting in the long line.

How is it this misinformation happens ?  Where do you see it happening online?