Simple algorithms could fix the hacker problem. It would literally take 1 person two hours with the source code and there would never be an issue again.
Check this out, if a developer ran ESP on a server and saw which people were going no/clip or teleporting, he could instantly permanently ban them. You could literally ban 100 people per day.
You could also monitor somebodies live source code as they're playing.
As all of this is a permanent fix and would only take 1 hour, I'm convinced that you're all eating glue in a corner with a crayon drawing stick figures.