What are you thinking? FOs try to sneak on with PREM or SKY all the time and pull huge DYKWIA hissy fits when the GAs catch them. Usually there's some room in the FC bins until the kettles start to board and decide to stop carrying the steamer trunk at the first space they see. So one doesn't really need to beat FOs to board, since they won't be upgraded anyway, just beat the real kettles who board after FOs and AmEx/SkyTeam.