Nothing an extended hunting season can't fix. How effective are grizzlies in culling the deer popularions in the lower 48 anyway?
I wasn't advocating re-introducing grizzlies here (out East). But grizzlies are effective in their habitats. They eat everything and they eat a lot (that's why large ranges are required). We have black bears out here.
But note that the contribution of grizzlies isn't simply for the purpose of herbivore control. It's one reason for them that interacts with human interests. A more esoteric reason is that grizzlies are part of the wilderness. We should help preserve them for the same reason we should protect sharks -- because in a healthy ecosystem, the top predators are both predators and scavengers; they act as controls on "excess" in the ecosystem.
Extended hunting seasons have been tried to cull the deer population around where I live, but it's ineffective because the deer are small and stunted (too many of them!). Birth-control administered at feeding stations or salt licks appears to work better. I should also mention another problem that deer overpopulation brings with it: Lyme disease. Nasty.