, the only stories I've heard/witnesses about bears getting food hung on the bear cables is from the rare bear that learns that if you bounce the cables, a bag simply hung over the hooks might bounce off
along with this------bears have learned that brightly colored objects---like packs and tents-----potentially could have food in them.....
hence, the incident at spence field earlier this year...
also---the shelters have "resident" bears that will hang around and if they see an unattended bag----they will grab it and run off...
Patman had this happen to him a few years ago and lost some of his gear as a result........
many of the shelter registers (logbooks) have stories about people having their packs "stolen" by a bear......