that happened to me as a freshman, i've been my height since then so they stopped me going into the lunchroom. They thought i stole the pass from a freshman and had to call in to the main office and check my address...
haha they really went all out! i looked older than most also cause i was taller....
i had the opposite problem, i went back to my middle school this past fall to get some paperwork or something, and the security guard thought i was coming late to school.....that means, he thought i was 13! 20, 13....okay, close enough