The role of media vis-a-vis crimes

The recent spate of stabbings in China raises an interesting psychological question and media dilemma quite apart from the tragic events themselves. Has detailed media exposure of the crimes exacerbated the problem, resulting in copycat acts, thereby further disturbing social security? If so, does the media have a responsibility to report such incidents in a manner that mitigates the likelihood of the acts being repeated?
Before attempting to address the questions, there is an important caveat to consider: Have stabbings actually increased in China in recent weeks? That seems to have a self-evident answer, because the stabbings have been more in the news. But without a statistical breakdown, it is impossible to know whether stabbings or merely reports on them have increased.
For example, three years ago the media reported that there was an "epidemic" of suicides at the electronic company Foxconn. For months, the press reported each of the gruesome suicides in detail. A host of news reports appeared to suggest that the company was at fault and needed to change its policies. It turned out, however, that Foxconn's suicide rate during that particular reporting cycle was actually lower than China's national average based on the number of employees working at Foxconn.