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I use a hand-held 30mW for public viewing nights and it is bright enough to be used near lights under a full moon. At a dark sky site it is too bright - you see the laser beam but the sky disappears. I use a 5mW on my dobs scope and that is plenty under dark(ish) skies.
The kid playing about with a 50mW laser is exactly the reason their use needs to be controlled. That thing can cause permanent eye damage so quickly your blink reflex won't save you. It wasn people misusing similar lasers that bought about the need to control them and that in turn created all sorts of trouble for responsible users like most (I hope all) members of this forum.
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