Not sure the exact false dandelion you are referring to. There are a a couple inedible lookalikes referred to as false dandelion, cats ear, etc.. Here in Pa the look-alikes do not have a soft hollow milky stem and do not really look or smell the same. I never have even thought of it as a concern, but my mom always picked them with me growing up. I would say that if you go out picking real dandelions with someone for a day you will not get fooled by any of the look-alikes.