I mean, with that kind of mindset, why even make a game at all. Because reality is there are always going to be people duping, exploiting and outright cheating. Just look at the state Tarkov is in, even with an entire company dedicated to anti-cheat, its still running rampant.
In a such a small community as in mortal, it'll be enough for people to record when its happening and GMs then confirming by stalking these players to confirm. The real way to prevent it from happening in Mortal though is that people who commit these offenses actually get punished (unlike MO1) and that there are measures to keep them from coming back. The time investment you have to put into a character for it to become "competitive" pvp wise is very high compared to other games and catching cheaters, banning them and then knowing when they come back and punishing them again will keep this kind of stuff mostly away on its own. Mortal will require anti-cheat though, especially in preparation for when the population grows too big for GMs to handle.
It's an old idea that I think originated from Henrik but never really came to life, maybe this time?