The warning was sounded by police in Newtownabbey following reports of this activity during the week.
Inspector McCarron said: “This week, we have received four reports of individuals shining laser pens directly at pilots.
“The most recent incident took place last night, Friday, May 10, as an aircraft was in the Jordanstown area at around 10:55 pm.
“Thankfully no one was injured or vision impaired as a result of this extremely dangerous and reckless behaviour.
“Not only is it an offence under the Air Navigation Order to endanger aircraft but it is highly irresponsible and dangerous.
“Lasers can cause temporary blindness and where pilots are concerned, this could result in a catastrophe and possibly lead to significant loss of life.
“Those involved in this type of activity need to be mindful of the impact which their behaviour could have.
“Those involved could face charges of being in possession of a dangerous weapon.
“If you use lasers in this way, you must be prepared to face the consequences.”