Again, who's to say what's useful? They're not private matters by rule, it's all public record. I could think of a bunch of uses for the data.

I don't have any problem with public record actually being public (and I do have a problem with public records that aren't actually public). Medical records and school transcripts are not public records. 911 calls are public, but you have to know how to request them and that usually means they aren't released unless it's a newsworthy story and a local media outlet jumps through the hoop. Visitor logs should be public (like they are for the White House). You can request anyone's FBI file after they die, but that system could be quite a bit more efficient.