Came to Nakhon in 1990, met a young British guy who was working and that was about it regarding farangs. Been married to a Nakhon lass touching 18 years and lived in Nakhon for a lot of that time. In that time there have been at least 3 farangs murdered either for business reasons or robbery. Various other farangs have had trouble with the locals but they have pretty much deserved it. There are a few who have literally fled!
The local people are friendly and will treat you likewise but if you act like an arse that's exactly how they will treat you.
The farang population here has mushroomed in the last few years and now, in just the city alone there must be over 100, mostly working and also a few retirees and others living out in the sticks. If you're looking for a small city, with islands, waterfalls etc nearby and off the tourist trail, Nakhon might be for you. If it's the girly bars and nightlife you're after, Nakhon is probably not for you.
Just MHO