On a basic c-box is it possible to ban certain IPs from posting? I'd like to know just in case I have to nip any potential problems in the bud before they mar the community on my boards.
Via your Cbox Admin Panel, yes.
I only have a basic cBox and if you login to your cBox at cBox.ws and click on the messages tab at the top right of the screen, then messages from the menu that drops down, you get a page with a list of messages posted. If you select the box next to a message, you can choose to ban, which I can only assume would be based on the IP address.