Well, of course they're there if you specifically search for this website. Susan's Place does limit access to some features if you're not a member (such as viewing profiles, seeing who was logged on that day past those currently active, etc.), but anyone can come here and view threads without an account. That means anyone can read anything you type in a non-restricted section of the forum, see your avatar and view any pictures you post in the image threads.
So, yeah, I'd advise those who plan on being stealth someday to be very careful what they share in a public space.