Safety is in the eye of the beholder. Jakarta is a big city with all the big city problems. As everywhere, you should be alert to your surroundings. Yes, there are extremists in Jakarta, as there are in all large cities world-wide.There have in the past been bombings in Jakarta.onsidering the size and income level of Jakarta, it is remarkably crime free. Compared to large American cities, the incidence of violent crime is very low. Of course, robberies can occur so you want to use common sense.