The motto of Hogwarts school of Witchcraft and Wizardry is Draco dormiens numquam titillandus; Latin for Never tickle a sleeping dragon. The Hogwarts gamekeeper, Rubeus Hagrid, loved and adored dragons, briefly owning a Norwegian Ridgeback named Norbert, who turned out to be a female and was subsequently renamed Norberta. In 1993, the Minister of Magic, Cornelius Fudge, suggested placing dragons to guard the school, after being compelled to remove the Dementors, something that Professor Dumbledor thought Hagrid would be very happy with.
Many useful materials come from dragons, but they are hard to obtain
(see Uses below). It takes over a dozen wizards just to stun a dragon. Muggles believe that dragons are a mere myth, but have been known on occasion
to glimpse these beasts. To prevent them from being seen by Muggles, and
to protect them from poaching, dragons are kept on Dragon Reserves
around the world, most of which are far from human habitation. Dragons
cannot be domesticated, despite individuals trying to do so. However, it
is possible to condition them via torture to make them somewhat
subservient, as Gringotts Wizardind Bank had done to the one guarding the lower bank,
who has been trained to expect pain upon hearing a certain noise. The
selling of dragon products is closely regulated by the Ministry of
Magic, and only dragon breeds that are over-breeding are killed to make
these items.