Haha - trust me, I understand your pain.
I would have to be the most considerate head torch user known to man.
I always ask for permission from fellow anglers before turning it on and I'm extremely mindful of where the beam is pointing.
The guys I fish with are veteran head torch users, so the "rookie errors", alot of people make, do not occur in my circle.
I have introduced alot of people to the joys of head torches but after a few years I started giving safety briefings before handing them out.
For instance - If I was going camping with a new crew I'd always buy som