Delbert, Evan, Ferdinand, and Gary are friends. One day, and…

Delbert, Evan, Ferdinand, and Gary are friends. One day, and on a dare, they all four decide to break into the local nuclear power plant at midnight. The plant only has a few workers at night, so the four friends know they can easily enter into the plant without being caught. All four pick the lock of the main door of the plant (it was a flimsy door). Delbert, Evan, Ferdinand, and Gary come across one door that states “DANGER” and “TOXIC SUBSTANCES LOCATED BEHIND THIS DOOR.” All four friends disregard these messages and, instead, pick this particular door’s lock too (all doors in this plant are flimsy). All four friends get toxic material on them that severely burns their skin, and they all have to be immediately rushed to the hospital. All four want to sue the power plant for their injuries. What defense can the lawyers representing the power plant argue?