It is very weird.

I wonder if the authorities are worried that someone would illuminate a plane with a laser, not to blind the pilot, but to target the plan with a laser-guided weapon. I have no clue if there are surface-to-air laser guided weapons. The main drawback would be that you would need to keep the laser pointed at a plane that's moving pretty quickly.

If it's just being used to blind the pilots, it seems like an awfully unreliable way to cause trouble, though I guess if the chances of gettin caught is very low, you could keep trying many times.
 

Now it looks like there is a copycat prankster doing the same thing. Moron.