I too think hunting is the answer. You do not need to kill many, just have enough hunting so they see man as the predator, not prey. But I also think this has to start early, before a critical mass of bears become habiutated to humans.

I see lots of bears because; 1) I hike a lot in Yosemite NP, 2) I do a lot of off-trail travel, and 3) I conciously LOOK for them. Often I see them before they see me. Most run off. No bear has ever shown signs of "attacking" for the sake of kill, they simply want to keep my out of their territory or defend their cubs. Some simply ignored me, something that would not happen if they had been hunted.

Did the study say anything about bears perception of color? Do certain colors attract or deter them? Or are bears all about smell. How sensitive are they to sound?

I imagine bears are like people or dogs- they each have thier own personality and a few mean pschyotic ones are probably out there. However, I am wary of ALL bears.