The Friday 24 of July, in The Santiago Times,  published an article, that he was speaking about the detentions to thieves for people common and current. I think that this actions are good and bad simultaneously. One the one hand, can be good because this actions demonstrate that the people is not indifferent with the bad things that happen to other people. In other words the people wake up of his individualistic attitude, to help. But I think that this actions that start whit a good intention,  it transforms in a very bad form of  unload his own ire, due tu injustice. 

From the point of view of the Psychology, is very complicated understand how the people change your attitud, and a person who was a victim transforms in aggressor. Is normal that the people feel annoy, but cannot turn in torturers when the power of the situacion (in this case a theft) is invested. 

http://santiagotimes.cl/robber-tied-up-by-vigilante-citizens/