What makes rogue bears dangerous and what should you do about it?

The main thing is not to cross paths with them, keep your distance, and stay away from noise. A starving bear is one that woke up in the middle of winter or didn't build up enough fat before hibernation, stayed hungry and angry, and is ready to attack anyone for food. You mostly encounter them in the taiga and the Urals, and yeah, they're really dangerous because they're unpredictable and aggressive unlike a normal bear. If you live in bear country, don't leave food in the open, fence off your territory, and be especially careful in autumn and early spring when starving bears are roaming around looking for food.

A problem bear is indeed dangerous, but here's the important thing: if you hear bear sounds or find tracks near your house, don't wait for it to come closer - call the forestry service or emergency services right away, they know how to handle this. In practice, it helps to leave spoiled meat or fish in an accessible place far from your home: a hungry bear will get to the easy food and leave, instead of breaking through walls and doors looking for something harder to find. A bell or rattle when you're moving through the forest isn't a cure-all, but noisy animals usually still leave before they get dangerously close.