It's pretty up and down, the judicial system as a whole is pretty messed up so certain things take preference I suppose, medical users have no real rights here though as far as I know and you can get yourself into a terrible situation buying here as the cops crack down on small time crime to meet quotas and you can end up going to jail and getting aids or killed in there very easily. South African jails are no joke, so in that sense to answer your question our rights are infringed upon by not being able to cultivate, sell or possess marijuana and it's scheduled as class B I think.
However because we are far less controlled than the Orwellian USA or the Brave New London people still seem to have a right to change this, and not in the sense that the government is allowed to control the usage, but a couple recently have gone to court stating they have had their human right to explore consciousness denied to them by not being allowed to cultivate and use marijuana on their own property, and it seems like they are going to win. If they do it can cause the constitution here to change, but to be honest it is unlikely it will make a change where people can openly cultivate their medicine. We are also controlled by the UK government so we the people never contribute to the final laws. I don't know though this is just my opinion, also we are unlike Canada where a large part of the population that has money has cancer, so it makes it difficult to keep it illegal. Here the majority of AIDS sufferers are extremely poor and either die or pay the little they have for medicines (poison), and it will not help these industries to legalise a plant that cures cancer completely, and could probably cure AIDS when administered in the form of pure cannabis oil.