If I light a joint without actually smoking it, will that set off the fire alarm?
No, they detect smoke. * Ada, why do you answer a question you don't know the answer too?
By raising your right hand when meeting another warrior you show your weapon isn't drawn and mean no aggression toward them. And also from lifting an armored visor for identification purposes
However smoke detectors (photometric type more than ionization type) will misinterpret the steam as smoke.
