There are some problems with this logic. When you eat lettuce, you (or the farmer) have pulled up or cut off the entire plant, killing it to get at the leaves. Therefore, you have preyed upon the lettuce, not parasitized it. How many of our domestic plants do we eat only a portion of the leaves, leaving the main plant body alive to produce more leaves? Rhubarb comes to mind. The stems of a rhubarb plant are actually underground, with the leaves rising above ground. The part you eat is really the petiole of the leaf. The sour taste in the petiole is caused by malic acid, which is non-toxic to humans. The leaf blade has a sour taste, too, but that is caused by oxalic acid, which is poisonous, so we don't eat the leaf blade. Can you think of other plants that we leave the main plant body alive to produce more food? The fact is that humans kill most of the plants they eat, whether it is the leaves, seeds, fruits, roots, tubers, or whatever. Therefore, should we be called plant predators? What is a good answer here, or is there a satisfactory answer? None of the humans I have talked to have liked being called either a parasite or a predator.
2. Two basic types of hunting took place among the bears: hunting for bedded calves, and chases for calves. In hunting for bedded calves, the most successful hunts occurred with elk adults in sight. The least successful were blind hunts, where no elk were actually in sight. In chases, the most success was achieved by a charge into the elk herd.
On the part of the elk, the best defense by a very young calf was concealment. Calves only a few days old appear to emit very little scent, which helps in concealment. The best defense of a calf that is old enough to join the herd seems to involve direct interference on the part of an adult elk. Either the adult ran in front of the calf as a leader, showing the best escape route and spurring the calf to greater speed, or the adult ran between the bear and the calf, thus confusing the bear. The most unusual behavior, to me at least, is the habit of some of the calves simply dropping to the ground when danger threatened.
3. The clear fact is that wolves do not pose a threat directly to humans, but tradition dies hard.