Don Janni:I probably would not be confortable if I stepped off into a school of them but then again, I don't swim away when I see a few of then either.
From what I understand when they are schooling they are harmless. It is if they are alone and hunting that they need to be more carefully watched. That said, you aren't their food so unless they make a mistake they'll never bother you. On my second OW checkout dive in Venezuela we had a large school swim over us about 2 or 3 meters shallower than we were. I have to say they have VERY creepy eyes!!