I study the map in my text book of where werewolf communities have settled around the world. They have claimed areas qere they can live set apart from humans, that way we can go relatively unnoticed. There is the occasional hiccup, but with Sages in abundance who work close with the council, the issue is easily put to rest before chaos spreads.
"Werewolf communities started to sprout in and around Serbia. From there, packs started to migrate in favor of having their own domain or to start anew," Professor Ivanov says during his lecture for Werehistory this morning. Since what I read about Fenrys was that he was first spotted in Serbia, this information seems to track so far.