I read an article a few years ago that came from Kenya. Hundreds of people had been slaughtered for being "witches"; apparently, sickness had been running rampant through the villages, people got paranoid, and mass hysteria took over. Government troops were sent in to control the situation. So things like the Salem witch trials do still occur; in this case, superstition, ignorance in regards to modern medicine, and probably racial tensions sparked it.
More practically, when teaching "The Crucible" to my students, I always try to connect it to a personal level. I doubt they are going to call anyone out for being a witch, but how do we respond when we feel excluded, jealous, insecure, guilty for wrongdoing, or defensive? We often lash out at others, placing the blame elsewhere so that we don't have to pay the consequence or own up to our weaknesses. On that level, the play, on a small scale, is applicable every day.