Considering the fact that the vests generally issued are XXXXXXXXXL and are not tucked in, I could see problems with the vest itself becoming dangerous around moving parts, actually, so is long hair, we should push for hair nets as well, laceless shoes, Lycra uniforms and little licenses confirming that we know how to avoid moving aircraft whilst walking, I mean after all, most fatalities and crashes occur on the ground rather than in the air aye!