I'm sure if you look hard enough there's a "study" somewhere that will tell you any diet regimen or specific type of food is "bad" for you in some way or another. I've heard stories of people on the "Paleo" diet have their blood pressure skyrocket, people on different commercial programs develop assorted health issues and even saw a vegetarian and a vegan almost get into a fist fight because the vegan thought they saw the vegetarian use butter to fry their black bean burger. As has been said, moderation is key and I doubt the occasional bacon and eggs breakfast or baloney sammich is gonna kill you.