Currently, hunts are already timed well by server-wide online spreadsheets and people can predict when they would spawn accurately. It's just a matter of waiting for the countdown to run out and going to that area. It's easy to find the mark if you know they should be there.
It's a ridiculous way of "hunting" as I see it. Make it so that timers are randomized for each spawn so people actually spread to all areas to look for marks and not just flock to the ones wherein the spawn timers are up.