seize the firearms of a family member they believe to be a danger to himself (herself) or others.
Every jurisdiction - state, province, federal government, the lot - needs this sort of legislation. There have been too many cases of parents and near relatives warning law enforcement of trouble looming only for their pleas to be ignored leading to avoidable tragedy.
While Canada may not have the level of mass death gunplay all too familiar in the States, we do have plenty of gun-related suicides and domestic killings. We certainly have enough to warrant a law like California's.