Thailands fundamental basis of law is quite different in Thailand, every act is ILLEGAL, unless there is a law (and process, and procedure) to make it legal.
I am curious, in such a system, on what basis would a penalty be determined? Suppose, they proved that you received bitcoins from abroad. What penalty do you get? How do they determine it, if there is no law saying: "for receiving bitcoins from outside Thailand the penalty is..."?