You beat me to it. That is not a safety issue anymore than it is in a bookstore - except to the extent that it makes the place LESS safe.
There ARE other ranges down there. You can even shoot at ETTS as the guest of a member, for a $20 fee, and operate by big boy rules, and shoot anything you want, as fast as you want. No M855 ball allowed, but other FMJ OK. They’ve got everything from pistol bays to a 1300 yard rifle range.