I was expertly pickpocketed on the Metro two weeks ago. Admiralty station.
My partner was separated and my wallet extracted from a zipped closed pocket under a jacket. I reckon at least four individuals working as a team. I knew instantly what had happened. My BA Amex card was hit within minutes. (I get phone alerts) Nobody near us as metro arrived but we were converged upon leading me to conclude we were trailed. We dress down when travelling of course.
All reported to police etc and nobody hurt. On recent travels to JNB, GIG etc we had not the slightest issues on trains and metro.