With how janky the game already is and done with a content design of "THere, we did it, we won't touch this ever again unless your PC combusts or our servers melt down."

An anticheat engine, while goooood, would probably end up in even more grief and melt downs of basic game systems / QoL and more basic functions not working.

Honestly? It's at a point where instead of witch-hunting. Much like in hockey if the referees lose control of the game, the players need to start to enforce them.
Have neighbourhood watches to stalk the stalkers or stand around them in a ring if a victim notices them and notifies the watchers, to protect the stalker victim hahahaha.

Honestly, SE is one big internal IRL scandal away from losing all its goodwill. The only reason they are still floating with their game design is because they provided so much good storytelling and things in the past. Now it seems like radiosilence and minimal new features, just floating your submoney into other projects.