I dunno, it seems far fetched to outlaw local BBSs if these local BBSs cannot access the internet.
With the internet, you theroectially(FFS someone tell me how to spell this!) gain the knowledge of everyone conncected. With BBS, you are limited to the knowledge of a few. So no matter how hard the few try, they cannot match the net. So if information restriction was the key, you'd hope that the governments would think local BBSs were a joke.
(of course that would be short sighted, but the governments are shortsighted anyways!)