Occasionally on this site I'll see a truly brilliant joke or pun, and I will upvote. But this is not one of those cases. I downvoted this pun train because this is not reddit and I don't want HN to turn into reddit.
Pun trains are so lazy - all you do to join the train is create a low effort sentence out of (in this case) something remotely related to lasers - Light, Amplification, Stimulation, Emission, Radiation, etc. It's not clever, and it spams up the thread enough that you have to collapse the train to see the next interesting comment.
The irony here is your comment alone is more reddit-esque than a common pun train is. Gatekeeping, mass downvoting, flagging, and then verbalizing your personal distaste to how a forum should run in a hostile manner... This is in every big thread. Best to minimize and move on, or simply just leave if this gets you so worked up. But you decided to use the downvote button in place of disagreeing with this very comment; something again, redditors also do not understand.
tl;dr (hehe) You'll likely be happier if you care less.
Pun trains are so lazy - all you do to join the train is create a low effort sentence out of (in this case) something remotely related to lasers - Light, Amplification, Stimulation, Emission, Radiation, etc. It's not clever, and it spams up the thread enough that you have to collapse the train to see the next interesting comment.