As can be seen in Section 5, only Thai people can enjoy protection under the Constitution. However, there is a move afoot by some Thai attorneys to assure that foreigners in the Kingdom are protected under Section 30. I don't know how far they'll get but at least someone is trying.
As it stands now, I as the Father of a Thai citizen can be hauled out of bed with no warrant and detained on the whim of any police officer. I'm made to report my movements like a criminal as seen in our 24 hour thread, and in a nutshell have no rights whatsoever except those which I can buy. Pete

Section 5. The Thai people, irrespective of their origins, sexes or religions, shall enjoy equal protection under this Constitution.
Section 30. All persons are equal before the law and shall enjoy equal protection under the law.
Men and women shall enjoy equal rights.
Unjust discrimination against a person on the grounds of the difference in origin, race, language, sex, age, disability, physical or health condition, personal status, economic or social standing, religious belief, education or constitutionally political view, shall not be permitted.
Measures determined by the State in order to eliminate obstacle to or to promote persons’ ability to exercise their rights and liberties as other persons shall not be deemed as unjust discrimination under paragraph three.