yeah, pretty sad i must say. With such a massive assault on seasons, NS was just left as is. And there are many notorious botters out there. One of botters on my list is over 3000 paragons already. Bots 24/7.
The main people banned in S5 were high-profile people or people high on the leaderboards, neither of which are present in non-season. Why would they? Its where casual people go to chill, no one takes their leaderboards seriously (not even sure they have any?)