I don't know about this. I think aiming could be an issue and people complaining that you shined them in the eyes with your laser. Whether or not this is possible, people will be complaining about it.
__________________
Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"