Then let’s rephrase it to “DO NOT leave the laser UNATTENDED” while in use or something.
I think phrasing it like that makes way more sense. As for our wiki, maybe consider using http://wiki.makespace.org/Equipment/Laser_Cutter as a guide on what to write. Their Wiki has some really good tips on there.
James Wilson,
You can tell people to not look directly at the sun as it damages your eyes all you want, but you will have idiots continuing to do so because someone told them they could. For my profession, I cannot afford to damage my eyes and I will not trigger you more in explaining why.