My writing and thinking are sharpened when I post on forums. When you choose forums that match your interests, you can really enhance your ability to express yourself.
Writing is one of the best ways to focus and align your intentions. This sub-forum is personal effectiveness. You need excellent communication skills become more personally effective.
What if you become frivolous? Quit posting frivolous stuff!
What if you spend too much time on forums? Go do more productive things that give you more of what you really want.
It is awesome that each person gets to live their own life.