So, using the program "ProcessGuard" (though this is not updated on newer windows so maybe use All-Seeing Eye for same function), it seems that whenever you logoff on a toon, it fires both Systemsurvey.exe AND agent.exe and sends blizzard a report... This is something that you cannot terminate, like a crash report, and is apparently sending some kind of data report back to blizzard. Fortunately you can firewall it, but...
Anyone able to shed any light on this by chance?