Alain,
I hear you. Couple issues:
1. How does closing the forum to guests stop them from registering and then lifting info anyway?
I guess we could ban them and their IP address, but are we really going to be able to find every piece of info that has been lifted from here and then ban them all from the forum? To me it feels like fighting the tide.
2. How much traffic will we lose?
When marketing to advertisers, which I would like to do eventually, they don't care if the traffic is registered. They care how many people visit each day, how long they stay on, how many pages they visit, and other metrics. Something tells me if we don't allow guests to view, we will lose ground on traffic, time on site, amount of pages visted, and other important marketing metrics.
Maybe we do a trial period of a week and see how it affects our traffic levels?
Feel free to chime in, I'm all for a dialog on this.