I am not a Lawyer, so take this with a pinch of salt, but I have been reliably informed that South African Law makes it Illegal to UpLoad Copyrighted material, but downloading content is NOT Illegal. The argument being that it is up to the copyright holder to ensure that the DMCA, or applicable laws in their own jurisdiction, are used to police their own content and its distribution.
However, Using Torrents to download or watch Copyrighted content is Illegal in South Africa because of the way that torrents work. Inorder to download you must also be seeding (Uploading) so you are in breach of the copyright act.
As for DSTV taking down Illegal streaming services in South Africa, on the face of it the clients are not at risk, however, if they are paying a subscription for the service then they could be charged as accomplices for aiding and abetting a criminal act.
The raids over the Last two Days should lead to some interesting Court Cases in the near future and finally give clarity to what is and is not legal in terms of South African copyright Law.