There are many many breast feeding and pregnant women who are taking hard core pharmaceuticals that were prescribed to them. That doesn't get questioned and judged, though, because the Pharma industry tells us that it is okay!
I do believe people can choose to use mj responsibly just like lots of people choose to use alcohol responsibly. Some can be reckless with it as well but I believe what we're talking about here is the responsible and moderate use of a natural drug. By all means it should be a free country but since this subject isn't under that banner I guess it brings up other unfortunate consequences to using (which is half the reason I don't - the other half I just don't really dig it).