One step removed would be a site like those visa sites that list each country and give insights into the real estate market. What to watch out for. Your legal protections. Is it safe. Sounds like Thailand may not have the legal protections required to make real estate investment safe. Sounds like you did everything carefully and still got scammed. This makes me think Thailand may not be a wise place to buy property.…
Only after collecting enough hard evidences, of course.
If they plan to scam hundreds of people, they might as well take the associated risks of scamming the wrong people who have nothing else to lose.