For everyone that thinks the answer is obvious try the NSSF web page and the NRA and see if there are any risk management guidelines on the issue. If you have insurance on the range does your insurer know if rangemasters are armed, and are you covered if a shooting goes wrong. You know, NY cop shoots bad guy, hits multiple bystanders. Or, do you have unarmed rangemasters, and then have bad guy go on a rampage.
Yes, this is a risk management question.