"Do you have a link supporting the DNA damage and alcohol relationship? That's interesting."

Not the op but alcoholics are likelier to develop e.g. pancreatic cancer. I believe the direct mechanism, though, is not explained. "About 7 out of 10 cases of chronic pancreatitis are due to long term heavy drinking":

http://www.cancerresearchuk.org/about-cancer/type/pancreatic...