It doesn't by itself, but it's a much better start. You can simply match up addresses with activity from other digital systems. That link is present in a global, transparent, up to the minute, cheap to ingest data source (the blockchain).
Comparing that to any other payment system (or combination of) where there is due process in collecting this information (hopefully accurate and valid) you're going to have a much easier time developing tools to detect and alert with Bitcoin.
Comparing that to any other payment system (or combination of) where there is due process in collecting this information (hopefully accurate and valid) you're going to have a much easier time developing tools to detect and alert with Bitcoin.