I tell all the new guys "if your manager doesn't want you want to lock something out, call me. I'll lock it out. There's nothing in this place worth getting hurt for."
Here, our equipment is old enough that sometimes powering things down means they don't come back up properly. I'd rather fight getting a machine back up and running vs having to hear about someone being injured.
Since this is marked NSFW, I can say this here: I might stand on the top rung of a ladder on occasion