Hi Hetal,
All these posts have been very interesting to read. If i could just support what Debi said and that is that one has to be truly security conscious in SA. If you are alert, and have your wits about you, you will be okay.
And yes a lot of South Africans are trying to leave the country but it seems that there are many returning as well. Homecoming Revolution is an excellent site, as already mentioned somewhere in the posts, and it should help with your decision.
I know how tough it must be to make such a huge decision but if you have doubts and no peace in your heart about relocating then it would be better to stay where you are. Just my two pennies worth!