I am like you Crpdeth, I have built up my tolerance for all things hot through the years- however, I knew I liked it hot at an early age (thank you tabasco sauce)
Habenaros are hot... There's also a thin little chili I used to eat with some Lao friends that would "slap your pappy". I've heard the Scotch Bonnett along with the Ghost Pepper in India are proported to be the hottest.
As for excess, too much of anything can become a poison to the body... even water. I will continue to consume all things hot, as much as I like without worry.
Take care when you get information.
The truth is generally seen, rarely heard.