I'm planing to buy a truck sometime in future. I already planed for 5 dash cams (2 front, 2 sides and rear).
At this moment I have 2 dash cam on my motorcycle (front and rear). Some people think I'm crazy, I hope I'm am. You need to have proof (farang or no farang). My gf had to pay if her car had no dash cam. Besides that you can make it clear that you were not at fault at the beginning before they try to plan you.