In another post on Current Affairs,there are many comments on the shocking levels of antisocial behaviour in Limerick,but judging by crime statistics,Dublin and Cork must be experiencing far higher levels of antisocial behaviour. The Gardai and the legal system has difficulty in deterring this behaviour when the crimes are petty:the jails are full and more expensive to maintain than boarding at an elite university. Electronic tagging could supplement imprisonment but it is doubtful if antisocial elements would be sufficiently deterred by that. And when antisocial behaviour falls short of the definition of a crime, even though its persistence can be a nightmare,there is little that policing can do without vastly increasing the police presence on the streets-clearly unaffordable given that the lifetime cost of pay and pensions for the average garda is about a million euro in today's money.
One solution that is popular in the US is the Guardian Angels' vigilante system. These are not Provo-style knee cappers. Instead,they patrol the streets,are taught self defence and the legalities of citizens' arrests. I don't know how successful they are but they have received considerable publicity. They have some foreign chapters,as in Australia Vigilantes to target Canberra crime hot spots - Local News - News - General - The Canberra Times
The first duty of the state is to enforce the law. When the state fails in that duty in some high crime areas,the people have the right to defend themselves.