Almost 700 reports were made.
Almost 700 reports were made to Irish Rail's text service for anti-social behaviour.
According to the Irish Times, texts from the Portlaoise to Dublin service detailed an incident involving a "very drunk man. . .shouting and hitting things", causing a child to cry.
Another texter described a man masturbating and watching porn on the Portarlington to Heuston service.
Barry Kenny from Irish Rail outlines how the system works: