I read a few studies that said so, but heard they may have been debunked.

No. Eating hot peppers actually helps prevent stomach cancer.

"...a case-control study reveals that chili consumption is protective against stomach cancer. Furthermore, the overall frequency of gastric cancer in Mexico, where peppers are more heavily consumed than in any other countries, is in actuality relatively low. Also, the rate of stomach cancer in the United States have been declining despite increased consumption of chili peppers in the past decades." http://sulcus.berkeley.edu/mcb/165_001/papers/manuscripts/_642.html