Letters issued to local businesses in Carlow and Kilkenny on Friday last.
It follows the latest disturbance there last evening during which Gardai made 2 arrests.
Already questions are being raised by councillors as to where they could be housed.
Gardai were called out again last night as she staged a sit-in at the local authority building.
Local buildings including Kilkenny Castle, the Visual Theatre, Carlow Library and Carlow County Buildings are lighting up green today.
Ideally they are looking for not just security cameras, but for security personnel there too.
Councillors were told Traffic Lights would not be the right solution.
Councillor John Cassin says in a town like Carlow, it's more lucrative for landlords to rent to students.
Councillor John Pender says the speed limits might not go far enough to tackle the problem.