QLD Police consulted widely, and took a very pragmatic stance by recognising the many legitimate uses of green lasers. However, if you are at the side of the road swinging the thing about with traffic around, you had better think up a good reason as they will nick you in a moment, astronomer or not!
It is the Smart State, don't you know
(PS I have a spare one if you are interested. I use a 30mw for large groups and full moon sky - but it is way too bright for a dark sky!!)