Some Jihadist Flash Gordon moron will no doubt try to cut an aircraft in two at some point if they can get the equipment together. Actually you can build a very powerful cutting l@ser for a couple hundred bucks and some junk off the scrap pile.
Unfortunately, it isn't even necessary to build one yourself any more. The Chinese ZM-87 is a compact laser weapon designed specifically to blind people at distances of up to two miles. Rumor has it that this was the weapon used against the pilot and passenger of a surveillance helicopter in the Strait of Juan de Fuca in 1997. The pilot was permanently grounded due to eye damage, and his passenger suffered laser burns as well. Supposedly this weapon is no longer manufactured. You can find a few photos on the Web.