Yap agreed with both Antonio and Simon's point.

Basically facebook has the following limitations:


Unstructure or single thread in facebook
This makes things difficult to search. Holding a proper discussion is probably not a good idea as your post will quickly push down to oblivion.

Copyrights issues
Well, today the photos or contents are yours but there is no guarantee the t&c won't change. Just look at Instagram saga. Besides, through years of discussions, BC has accumulated wealth of butterfly content and knowledge. This shouldn't go to waste.

Facebook content is not really search able from outside.
If you want someone to reach you by google search, you need to have a homepage. Most company have a face in facebook for viral marketing and also as additional channel to reach out to wider audience.

And not all of us are on facebook.

Just my 2 cents.

Anyway, the score is 8-0 now.