It happens sometimes, Grahame. Frank will delete them as soon as he sees them. I can't figure out what these people think will happen. It's not like any of us are likely to take these posts seriously or follow their links. It a complete waste of their time and franks bandwidth.
It's not an individual, but an automated system. Ning has had a bit of a security problem from time to time, so t hose creepers get in. Simple deletion handles the issue at the local level here. . .