Is it worth reporting that I saw a green laser being pointed at the aircraft as a passenger? I was on approach to Vienna yesterday evening when I observed two 2-second green laser flashes 5 seconds apart from one of the rear passenger windows of the B737 where I was seated being pointed at the aircraft. 

I'm wondering if and what I should do since green lasers are dangerous, and I'm convinced the aircraft was being targeted. Should I report this to the relevant authorities? Is it very common or a rare occurrence? The co-pilot didn't seem very bothered about it in any case and he hadn't seen it.



Updates:
20th December 2014: Sent an email to the relevant Austrian authorities. Will see if I get a reply.
22nd December 2014: Sent a report to AustroControl as well.
8th June 2015: No reply to date.
In that case I would definitely report the incidence!  It doesn't have to be done by police, but you can give the airport authority a call, that way you don't have to make too much of a big deal about it, and still informed the ones that need to know. They can then advise pilots and keep their eyes open for it. If there is a attack on the airplanes, it is important that it is being reported before it is too late. If not, then you didn't make a big deal out of it and are not in trouble for wasting time and money. 

So, a call where you could explain what you have seen and give a opinion is your best bet, if they tell you off then hey, you've tried it!