No, it is not dangerous to most people, though I wouldn't eat it all the time.
Green bread mold may give you a bit of diarrhea if you eat it, or if you inhale it, it may cause an Asthma or allergy attack. I wouldn't recommend it, especially if you have colitis, Charon's disease, ulcers, asthma or other breathing related disease, or you are allergic to things like penicillin (penicillin is made from bread mold, but it may or may not cause a reaction).
But don't worry. For most people with normal immune systems, if you eat a piece of bread or cake with green mold, you most likely won't even notice it or get sick in any way, and you won't die. Can't say that's true for 100% of the people, but if you are already that sick that your immune system can't handle it, you probably already are aware of that fact.
sometimes when you are allergic to mold/mildew you can swell up!
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First: There is no such thing as green mold. The green pigment is simply the result of the spores of the mold, which enable reproduction. There are many different types of molds, some of which are more harmful than others. But in large enough quantities, any mold is harmful to inhale.