Does Aversive Conditioning Work?

This video summarizes three years of working in Whistler investigating the utility of aversive conditioning and conditioned taste aversion to reduce the need for lethal bear management.

The idea is that if they can condition the bears to be more afraid of humans, they will wander into dangerous areas less frequently, and thus limit the need to put them down. What types of aversion did this experiment try? Which was the most successful? What other applications could these findings be applied to?