>>391115>muggle is a harry potter term first... meaning non magic/wizard normalfolk.Lol, yes, it is. It was then appropriated by the geocaching community, to refer to the unitiated. The geocachers who got me into caching recommended against doing anything in view of the muggles, because they always assume the worst, like you're planting a bomb or something. And clueless muggles have called the police to report bomb threats. Many times. So, for the benefit of both the geocachers, and law enforcement (who have real crimes to investigate), it's best to keep your activities as secret as possible.
Green lasers are pretty damn common at organized star parties. Because everyone around, no matter how far away they are from you, can see exactly what you're pointing at.