I never thought to check this until the various conversations about FB, non-members, etc. Now I'm curious if this is new. I logged out of HT as a member, then came back as a guest. I clicked on the Members tab in the blue bar. I was able to view a lot more than I expected to be able to see. To be sure, several members have locked down visibility to their profile but many have not. I was surprised to be able to see profile posts/messages between members, which in many cases included real names, etc. Based on this, I've revised my privacy settings on my profile to prevent guests from being able to view. Maybe guests could always view member profiles including profile messages before Xenforo or is this new?