I'll wager that if they were called "fastener drivers", no one would object. But you want to use a nail GUN. Are you crazy?? LOL.

That's my guess. I can think of a lot of general construction tasks way more likely to injure yourself and others than a nail gu...er.....fastener driver.

Fact is, though, sure they can be dangerous. My old style, spring loaded staple gun will shoot staples across the room at high speed, enough to cut someone (don't ask how I know) and certainly enough to seriously injure you if it nails you in the eye. The question is "how dangerous"? I'll guess that more people get hurt climbing up ladders than getting bit by a nail gun.