Yup they’re dangerous as fuck. My mom (kindergarten director) once visited a kindergarten in Svalbard, Norway where there’s a rifle hanging on the wall above where the kids get dressed.
The idea being that if a polar bear wanders towards the village, it’s essential to be able to fight it off and protect the children.

Polar bears will absolutely try to hunt you. They’ll eat anything that moves. The only way to deal with a polar bear is a gun.

Thank you, that website annoyed the hell out of me