In my experience: there are still a lot of good links exposed by mistake. Sometimes it is possible even to find CHS nicknames or understand from screenshots what forum they were talking on. Or names are sealed but nicknames no. Or jabbers partially exposed etc.Pacer is not going to help with a sealed indictment though, I think?
Of course, in public there is only a small tip of iceberg, I agree with you. Another thing - some search queries can be monitored