I eat a lot of of chile here. When I order a fried rice I ask for extra priknampla and pick the little chile peppers out and leave the fish sauce. I like somtam which makes you sweat and gasp from the heat of the chile.
I rarely get sick. I travel around the country a bunch and eat at the cheap Thai places all the time.
I get a little endorphin buzz from eating hot chile peppers, it's addictive.
While the chile peppers might burn going in and coming out they're actually very good for your digestive track.