"Irresponsible actions" refers to behaviors or choices that are thoughtless, careless, or lacking consideration for the potential consequences. It suggests a lack of responsibility or accountability for one's actions. Full definition
Rather than punishing students for irresponsible actions, these practices involve teaching students to make responsible decisions and follow through with responsible actions. (ascd.org)
We ourselves invite it by our own irresponsible actions against «mother earth». (realclimate.org)
«The Medicaid Redesign Team was supposed to involve» stakeholders,» but did not allow for input from those representing New Yorkers injured by irresponsible actions of doctors, hospitals, nursing homes and other medical providers,» said Stephen P. Younger, the bar association's president» (cityroom.blogs.nytimes.com)