The cockroaches themselves are not necessarily dangerous, but they do carry disease causing bacteria that may be spread into your food, dishes and other sensitive locations if you have roaches living in your kitchen. Their fecal matter can also become airborne, and is a major contributing factor to childhood asthma, as well as allergy symptoms in those who are sensitive. For these reasons, it’s important that you take care of a cockroach infestation as soon as possible.