When these came up the first time about 22 years ago. They were some what shorter. Some fishing related and Non fishing related. If you report on what you caught or didn't catch(Skunked) you don't need a header. It's when you want to talk about anything not fishing related you need a header. NF It's only required at the first post in a thread.Somewhat Flyfishing Related and Not Flyfishing Related if that's what you're referring to.
At least that's my take on it.
Corrected…Not For Reading
Some for Reading
Not ‘Futbol’ Related
Some ‘Futbol’ Related