This is definitely something that will be coming in the future. Will need to be a balance since some site owners might not want the user to be able to turn off all columns, such as those that have ads. Within the next couple of versions will be putting in some payment processing options, so admins can setup a payment feature and thus enabling certain features for those that pay. This would be a good use for that. Someone that pays might be able to turn off even the portal boxes that contain ads while someone that doesn't wouldn't get the option to turn off the ad islands.
Right now we're just sticking to strict bug fixing to get version 7 finished and out.
