"Is it a huge, vital advantage to know of the existence of B# ? "

Actually, yes.

But in this thread it is more important to acknowledge that pretending to know there isn't such a thing, and collecting cash for it, is fraudulent.

This could have been agreed a long time ago, but Josepp has been subjected to ridicule for bringing it up.

In this case the mob have incorrectly identified the troll, and might have done bettter to listen and think.