My answer is----------It depends!
My oldest Son and a few of my close friends that are reloaders are welcome in my house and I would not mind them using my reloading room. Those same guys are welcome to use my kitchen, shop, truck, side by side, ect. If something happens while they are there I value our relationship enough to cover the cost. I expect that they would insist on taking care of it theirsellves.
With a few other good friends, I would want to be there. Some of them are reloaders, but probably shouldn't be! They would be likely to pour Bullseye into my can of 4350 or to drop a full box of bullets on the load cell of my expensive digital scale! Or to just leave an unknown powder in the measure! They wouldn't
put anything away and I wouldn't be able to find anything!
The first set of guys would turn off my air compressor, welding machine or torch when finished in my shop. And roll up the cords and hoses, turn off the lights and lock the door. Probably even sweep up any mess they created.
The 2nd group of guys would not turn off anything or put anything away. The air compressor would still be running, so would the welding machine and the gas would still be on on the torch. Cords and hoses would still be stretched out, the door open and the lights on. Sweeping up------uh, forget it!!!
You can forget about casual acquaintances or strangers. I would gladly help them but they would have to earn my trust and respect before being there alone.