Why are these forums not using HTTPS? Most browsers are warning when you sign in to a non-secure site these days, and certificates are now free as long as you're willing to renew every few months (which can usually be automated).
We're currently rolling out HTTPS across our network. Some features for VBulletin weren't built for HTTPS so we're working out the bugs. Once we have everything up and running, we'll be adding it to all sites on our network.