The Federal Bureau of Investigation today declared a war on laser pointers. Namely, the people who point them at aircrafts.

The agency will now offer a $10,000 reward for information leading to the arrest of a person who commits the crime, a felony punishable by five years in jail. Let the FBI explain why you really shouldn’t point a laser pointer at a plane.

When aimed at an aircraft from the ground, the powerful beam of light from a handheld laser can travel more than a mile and illuminate a cockpit, disorienting and temporarily blinding pilots. Those who have been subject to such attacks have described them as the equivalent of a camera flash going off in a pitch black car at night.

“Aiming a laser pointer at an aircraft is a serious matter and a violation of federal law,” Ron Hosko, assistant director of the FBI’s Criminal Investigative Division. “It is important that people understand that this is a criminal act with potentially deadly repercussions.”

The 60-day campaign will run in Albuquerque, Chicago, Cleveland, Houston, Los Angeles, New York City, Philadelphia, Phoenix, Sacramento, San Antonio, San Juan, and Washington. In 2013, 3,960 laser strikes against aircraft were reported, with many more going unreported.