Medical marijuana patients should not have their children taken away. People who smoke pot illegally usually just receive a ticket and they do not have their children removed from the home. Why would you treat a patient taking their medicine worse than someone who is recreationally using drugs. That logic does not make sense.
There are many things that contribute to bad parenting. Using cannabis is not one of them. In fact, when compared to alcohol or tobacco use, cannabis is not only far less threatening and likely to lead to health and social problems, but it benefits many users, whether they hold a license or not, whether they claim to be recreational users or medicinal users, in countless positive ways. The idea that anyone would consider taking a person's child away over something, that on it's own, is such a non-issue, is baffling to me. This is what I call reefer madness. Legalize it already and let's move on to more important issues.