Frankly these people are idiots, and they are asking to get killed. They do more harm thea good not only do just act upon on their on views concerning crime if they happen to do anything to an actual suspect they would have solid ground to have the charges dropped. If you want to do something to help more power to you, but dressing up in some stupid outfit harassing citizens isn't one of them. In the end you are just going to cause more work for the police and the medical examiner when they have to figure who chopped up your body and dumped it in a river.