R. Moshe Sternbuch's view, as quoted on the Daas Torah blog (link):
This Shabbos I had an intensive discussion with Rav Moshe Sternbuch, shlita about these issues.UPDATE: See here for further clarifications: I, II, III, IV
1) Child Molesters
He stated without hesitation and said that I can quote him - that if one knows that children are being molested that one should call the police. He noted that there is an important distinction to keep in mind. One calls the police when it is clear that someone is still in danger. Thus one does not automatically call the police concerning an event that took place once and is not going to be repeated. In such a case one should first consult with a rav. When I mentioned that many rabbis apparently felt differently – he dismissed such a view as being wrong. He noted also that it is important for the community rabbis to have a good working relationship with the police. That means that the police need to be sensitive to the needs and nature of the chareidi community and the community needs to be understanding of the police. He said that there is such a relationship with many police forces.
Click here to read moreThe rule is summarized simply – if one knows that someone is being physically abused or will be abused then it is required to call the police after consulting a rabbi who agrees he is a future danger as is common in such cases.
2) Vigilante actions
I mentioned the issue of vigilante actions in the chareidi community and whether they are to be praised or condemned. He noted that there are unfortunately disturbed and misguided individuals in the chareidi community – as there are in other communities. The general rule is not to make a public protest when the problem is rare and insignificant. He said that it only encourages these individuals when their activities are publicized. However if they progress beyond this stage then it is important to take action. He mentioned the Bedatz dealt last year with vigilantes who burned down a clothing store in Geula. I mentioned the recent incident in Beitar. He said he condemned such behavior. If it is clearly not a rare act of a disturbed person then it needs to be dealt with.