Otter, some can really dazzle and incapacitate pilots. I haven't been one but there are several reports of retinal (that's in the eye, not the other end) damage.
Frequently see people with lasers at Ben Buckler in Syd dancing them on the water below, every now and then they're going to try and plant a spot on a moving aircraft. I suspect that many mean no harm, they just don't make the connection with the harm they can cause.
Perhaps a law requiring lasers to be sold with a note warning that pointing at eyes can be harmful and that pointing at aircraft is a crime.