If it's insulting to tell somebody they are wrong, they need thicker skin. And I'm insulted as well. I'm quite thoroughly insulted that somebody who apparently has no knowledge beyond television is trying to tell me about lasers. Does anybody care? No. Should they? No. Frankly, being insulted or offended is meaningless and should not be taken into account in any context if it in impairs honest and efficient communication. Moving on.Play nice, "Heaven" is taking the time to give you feedback, and right or wrong his thought process is one that some of your players are likely to share. It's fine to disagree with people, but try to keep it polite please; you could easily have said the same thing without seeming quite so insulting.
That is about as incredibly wrong as anything you could have ever possibly said.
Will a player share this thought process? Probably yes. They'll also probably expect the laser to have a huge, distinctly visible beam and be reflected by shiny surfaces. None of these things are true, and none of them will be present. If they don't understand this, the game comes with a sizable database (which I will write personally) that should adequately explain this and many other things. If they still don't get it, they aren't worth my time.