I think you are somehow correct here, sometimes people can misbehave a lot in their best interest in getting extra funds from people they are trying to help or working with. There are some locals especially the chairmen in many of these local areas that will want to compromise the process just to make more money from the team. That means LandDAO must make sure that they are dealing with the right set of people in these local regions so the process of acquiring these lands in large quantities will not be jeopardized.
Do you mean somehow what might be the reason why you still have some atom of doubt? I know LandDao has a team of expert that makes research on the lands before bringing it up to the team to make the necessary arrangement to acquire the land. However, it will be better if the locals are government recognized. That is they are working with individuals under a regulated company that is recognized by the government of the country. For example, instead of random locals it should be real estate companies even if it might cost more. I don't know but it depends.
This is actually an issue since most of these local regions would find it difficult to provide government approved documents ro prove that the land being sold is their own, and since LandDAO wants to purchase these lands, necessary documents would have to be de available to them to avoid some unwanted situations from arising in the near future, most of the documents you get from being land in some local regions are self made, this is to say that even if the land being sold is their own, the documents they make available is self fabricated and can sometimes be considered illegal by certain government bodies, this really complicates matters as LandDAO would not be able to buy such land if they intend to avoid any potential shenanigan from coming up, ultimately teaming up with local but recognized real estate companies will be the right way to go, this might be more expensive but it comes with alot of safeties with all tge necessary government approved documents made available to the buyer(LandDAO) during purchase removing the risk of the land being confiscated in the future by the government.