It's simple really.
Beacon on:- move out the way!! ( apart from the ground Engineer who should know what is occurring and why )
Beacon off: Safe to approach the aircraft open doors etc etc..BUT with caution for the hazardous environment you are working in!!
It's not rocket science fellas, what ever happened to damn common sense!!
Do you really need to have your hand held over everything?
You are a Qualified Crew, use your Brains.