We recently published a paper in Gajah (here) that suggests that an elephant may have changed his behavior after being fed by humans. In general, wild elephants that are habituated to be fed become a permanent nuisance. But left alone, this particular elephant slowly went back to his old feeding habits. Actually, more recent observations apparently confirm our conclusions. Rivaldo, the elephant in question, when not fed, tends to avoid villages.
This is rather good news: this indicates that if we humans are willing to stop encouraging elephants for any reasons (tourism, “friendly” behavior), some elephants may simply stop being problematic. This is why it is very important to respect the law regarding feeding animals.