Beware! You may have to change your natural behaviour at airports – don’t muck around, don’t joke, don’t skylark with friends…or the lurking police officer might decide to demand your ID, search you and your e-devices, make you miss your flight and take you away for questioning. The enhanced new search powers are so broad that AFP officers could apply them in just about any situation, certainly not just when mass panic is being provoked or someone is unfurling a provocative flag. Paul Gregoire reports