What started as innocent fun turned into a travel nightmare for a Chinese man when his 4-year-old son doodled across his passport. Airport authorities refused to let him board, leaving him stranded and highlighting just how seriously international travel documents are taken\u2014even when the \u2018damage\u2019 comes from a curious toddler \ud83d\udd8d\ufe0f\u2708\ufe0f