You also need to look at the cost associated with each option. Does the owner of the board wish to foot the bill for another board for NFR topics? Does Bob want to moderate that board? Does he even want to be associated with what may be posted on such a board? These are questions only he can answer, if he chooses. What I think people forget sometimes is this is not a public forum, it is a private board and we are here as guest of the board owner. We do not have the right to say anything we wish on this board, it is up to the board owner to decide what is appropriate and what he would like to be on his board.
I think Bob has been a very kind host and very tolerant, but just like when you host a large group sometimes you have to have a bouncer to maintane the atmosphere you wish to have at the gathering.
Should there be a NFR area, I am not sure. If you wish to discuss matters relating to fishing this is the place. If you wish to have discussions unrelated to fishing and the resource there may be places geared more to such conversations, or they may fit here nicely, that is the owners right to decide.