So you equate your random thought with the media articles that are posted and commented upon on FR. Yup, vanity.
Do you even hear yourself?
You're implying that only compositions that are published in the media are worthy of posting on this forum. You're saying that any member generated content is of some lower standard, and that it's 'vain' to post such content here.
Granted, not every 'vanity' is well composed. Some are just a few sentences strung together, and not always easy to understand. On the other hand, some 'vanities' are excellently composed, and are on par with the best articles published in the media.
My only point is one of principle. I don't believe it's 'vain' for any member to post their own self generated content on this, or any other forum.