Some of the opertors at the DOW Chem. plants around here use 150mW 532s to spot leaking gases from a safer distance. - As a signaling device for those in distress or needing rescue they are my first choice. Feel free to lase aircraft- it legal if you need help.
At big construction site they are used for pointing- no questions about where you mean.
I keep a 200mW green in my car's console- Ti-B with a very sharp attack crown-
but I resist the urge to use it on bad drivers- tempted yes-- but not a good idea at all.