This incident had absolutely nothing to do with road safety.
Indeed 100% @Duke of Marmalade , pure out and out criminal behaviour and according to reports in The Irish Times online there were reports and recordings of what looks like them trying to break into cars and houses around the Athy and Carlow areas before the first incident of them driving down the M9 the wrong way that night. Gardai had set up a stinger operation at one exit off the M9 to disable the car they eventually used as a lethal weapon against an innocent family, but the criminals concerned used a different exit and avoided being intercepted and having their vehicle disabled.(Yes, one of those families.)
@Howth Head do you mean those families that run illegal rolling road blocks on main roads inconveniencing and endangering legal road users to run their sulky races? Sulky racing from BBC
Again behaviour that shows no regard for anyone else because its part of their culture perhaps?