I once talked to Jon DeBerti about the subject and he said that when crazy legs got relocated to quehanna that he reverted back into an elk that didn't tolerate having people around. He would move out of an area or even hide when people were near him.
He also said that if the people in Treasure Lake thought they had a problem with the deer being "tame" they oughta just wait til the elk find out about that haven.
There have been Elk in TL a few different times. For whatever reason, they didn't stick around. And exposure to humans is almost certainly the reason the elk in town appear tame. Most of the people that grumble about the elk hunt and the "tame elk" have clue what the elk are like that don't live around towns and people.
A lot of the bigger bulls that are seen in the Bennezett area during the rut, travel back to their wintering ranges in the Q. They seem "tame" in and around the viewing areas during the rut because their mind is on other things and not on all the humans staring at them. Once they return "home" so to speak, they become much more wary again and do not tolerate much.