This announcement comes from the folks at the GSMNP, however it applies to most black bears in the Appalachian Mountain range. With exception to those that have become accustomed to eating out of dumpsters and other "domesticated", people fed bears which are potentially very dangerous animals.
“Bears are very active right now, and we’re receiving reports across the park of bear sightings along trails and roadways,” said Park Wildlife Biologist Bill Stiver. “We ask for the public’s help by respecting bears’ space.”
Bears should be allowed to forage undisturbed on natural foods and should never be fed. Park officials remind visitors to properly store food and secure garbage. Coolers should always be properly stored in the trunk of a vehicle when not in use. All food waste should be properly disposed to discourage bears from approaching people.
Hikers are reminded to take necessary precautions while in bear country including hiking in groups of 2 or more, carrying bear spray, complying with all backcountry closures, properly storing food regulations, and remaining at safe viewing distance from bears at all times. Feeding, touching, disturbing, or willfully approaching wildlife within 50 yards (150 feet), or any distance that disturbs or displaces wildlife, is illegal in the park.
If approached by a bear, park officials recommend slowly backing away to put distance between yourself and the animal, creating space for it to pass. If the bear continues to approach, you should not run. Hikers should make themselves look large, stand their ground as a group, and throw rocks or sticks at the bear. If attacked by a black bear, rangers strongly recommend fighting back with any object available and remember that the bear may view you as prey. Though rare, attacks on humans do occur, causing injuries or death.
For more information on what to do if you encounter a bear while hiking, please visit the park website at http://www.nps.gov/grsm/nature science/black-bears.htm. To report a bear incident in the park, please call 865-436-1230.