The poster's idea would ruin an already abused system even further.
As it stands, this is what makes a hunt...a hunt.
It was never intended for players to know the exact time of death server wide. But the hive-mind has made it so whenever one dies without it being common knowledge, that is the anomaly. Weird.
Hunts are supposed to have a little mystery surrounding them. This tightly scheduled zergfest is in no way what SE even remotely intended.
They're not about to exacerbate it with a big glowing red easy button.
That said: Maybe something along the lines of the Hunter-Scholar offering hints as to "his progress" in tracking the marks.
IE, the one in Moraby: "Blah blah blah Croakadile... But I can't recall a sighting in a good while." or "Blah blah...Croakadile...It was only recently it was driven off by adventurers."