This has happened at quite a few places recently and to me personaly twice in the last 6 months. Thankfully the laser was far enough away and comeing from a bit off center so I never had it shine straight into my eyes. For me it was an annoyance rather than a danger.
That said some of these devices are pretty powerfull and have the potential if used correctly to cause real damage. I think a police helicopter driver had his vision impaired by one of these lasers. It beggars belief that people are this dum and think its a lark, bit like putting rubble on a railway line to see what happens. Maybe the plods should declare it as terrorist activity and proceed accordingly.