Maybe UA could print up some gold paper crowns (lke Burger King's) that say "1MM", "2MM", "3MM", and "4+MM" and make them available at the boarding area for those who qualify. I can guarantee everyone will notice. Will not add to pre-boards AND provides recognition - win-win. Not only that, but MM status doesn't expire, so UA doesn't have to worry about people wearing the crowns if they fall in status. I guess there's the chance some MMers would actually allow someone else to wear them during boarding - sort a stolen valor violation.