TexasCHLforum.com

You could setup a Gabbly chat button that is only visible upon login. It could also show how many are logged into Gabbly. While this won't keep out interlopers, it is highly unlikely that outsiders would even try a Gabbly login. Of course, existing members could still troll a Gabbly chatroom as they could use any login they choose for their Gabbly handle.

We used Gabbly on a couple of other gun boards and it worked fine, was a lot of fun and members more or less self-policed with regard to keeping it mostly civil.