I looked it up. It seems to be pretty rare.
Fatalities due to black bear attacks have been almost non-existent for centuries, with the last recorded instance occurring in 1784.
While actual attacks are uncommon, reports of human-bear conflicts are more frequent. These conflicts include sightings, nuisance behaviors like bears accessing trash, or property damage.
https://biologyinsights.com/how-many-bear-attacks-have-happened-in-new-hampshire/

“Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety” ~ Benjamin Franklin
Yes and no. In the mid 2000s bears began to encroach on Grafton residents and attack people. In response, some residents hunted the bears.
There is a great book written about the Free Town Project if you are interested in learning more.
A Libertarian Walks Into A Bear