Any warehouse or large facility type place I've worked in (several) has at minimum phones at the will call counter and at whatever place pulled orders get taken to be put together for shipping out. Add to that if the place is big enough everyone isn't within yelling earshot of each other people got radios/walkietalkies too. That's in addition to all the comms in the offices and PA/loudspeakers aren't uncommon either.Y'know, if I'm in an active shooter situation and I don't have my phone, but I do have a nice safe place of cover where the shooter can't see me I'm not going to leave that place and go (potentially) all the way across the floor of the warehouse so I can call the cops. I'm going to search for even better coverage.
Last three warehouses I was in where active business was going on, the only hard line phones were in offices. There weren't any on the floor, and there was no way to stealthily get into the offices from way back in the stacks.
C'mon guys.
The chances of getting wrapped up in a shooting in a place like that, while technically is a "chance", fall somewhere between getting struck by lightening and suffering a shark attack in Kansas.
That's no excuse for everyone to be tweeting when they should be working and paying attention to what the hell they're doing.
Talk about an edge case, jeez.