The grizzly, as a top predator, was not really very afraid of humans and many people were killed by them in California before they were hunted to extinction. I would definitely not want them around as a farmer in the 1800's. With antibiotics, helicopter transport, and ER rooms today, I might support a reintroduction of grizzlies to the state. There is one on the state flag, after all, and are amazing creatures. On the other hand, I like how relaxed I can be hiking in the California Sierra without them. Hiking and camping in the Canadian Rockies feels a lot different.

Mountain lions (at least the ones evolved when we hunted them for the last 12,000 years) are much less hazardous to humans than grizzlies or wolf packs.