This is an old trainig concern that arose years ago that I thought was dead but with the rise of Starwars as a cult film it may be relevant again,you decide if it's usefull. Years ago we did a recue scenario in which we used younger children as some of the "victims" and we failed to find some. We later found that they had crawled out of their areas and hid because to them the firefighters looked and sounded like Darth Vader.  

        With the resurgence of the Starwars classic , it may be  pertinent for those of you involved in childhood fire prevention education to expose kids to the looks and sounds of S C B A  and a quick lecture on the fact that the f/f on the other side of the face piece is a friend and not to be avoided . You decide weather you think this should be included in your lectures but I felt compelled to share it. We had no idea the effect this had on kids but young minds are fertile imaginations.