Crackers seem innocent enough. And, to be honest, most of us even think of them as a healthy alternative to bread. Who hasn't thought of putting some cheese and tomato on top of a cracker instead of turning it into a whole sandwich? We don't even mind a bit of tuna and avocado on ours if we're really trying to make things gourmet.
The reality of crackers is that they're often made with hydrogenated oils that contain trans fats. Most brands also contain a high volume of sodium, which can cause obesity and heart-related problems. One or two crackers here and there is not going to be an issue, but the problem with crackers in general is that it's hard to just eat one or two. Always read the label and switch to a more natural brand without any trans fats.