I have not run into one yet, but after reading the story of the guy that was killed by a grizz, I think it was around Pincher Creek area while fly fishing, I now carry a defender on my back when I am fly fishing for grayling and stuff in grizz county.
An ounce of prevention (in the form of lead) is worth 10 million pounds of cure!
Those grizz sure do intensify any outing don't they?