I do not agree with women who are pregnant or breast feeding consuming cannabis .
Even if some claim the risk is minimal why would you take any risks with a child ?
I do not believe it is harmless.
IMO anyone who tokes whilst pregnant or breastfeeding is being completely selfish.

As for the idea that there are two distinct types of users I would have to say that I strongly disagree that cannabis is in any way a "gateway" drug , this is a goverment argument that is used to demonise cannabis. The "type" of users is as varied as thier reasons for using and that's as varied as the human race is.