The same could be said about field vehicles being used at games. They have the capability to cause injury or death if an accident were to occur. Yet we have all used them at games time and time again, and to this very date they are still being used at Airsoft games despite the obvious risks. Would I say to ban them? No way, they are fun as hell, and really add to the atmospherics of gameplay. However if the objective is to eliminate the absolute possibility of bodily harm, then quite a lot of "fun" things would need to be removed based on that variable alone.
I think the best policy would be, that if you are uncomfortable with something being used at a game, exercise your right to voice your opinion, and simply do not attend to stay clear of it.
Class 1 rated lasers are black and white. As black and white as the import documents required for them to enter our country under the codes provided by Health Canada. They are the safest of all lasers, the ones that can't cause bodily harm. There is no ambiguity there.