Funny how many farangs seem ashamed of the looks from their thai wives and try to compensate with how their mixed children look.
Time to wake up and understand for most of the Thai nationalists, anything that is not pure and fully Thai is just another this or that. All foreigners are put in the same bucket, no matter what some may claim. Be nice, respectful, polite towards all in Thailand, be them foreign or local and you'll be fine. Be rude or an arrogant flaunting your money in a vulgar manner, then no matter if full phalang or mixed blood, the locals will look down on you. Simple maths.