More screening of travellers who display suspicious behaviour does not mean no or insufficient security surrounding travellers who do not. Security profiling would simply me a part of the security operation. What it does mean is individuals who buy one-way tickets with cash and no luggage will be more closely investigated. Yes terrorists may adapt to this, but this will make it harder for them to operate (as their operatives have to act identically to normal passengers or face exposure) and increase the chances that a ‘slip-up’ of theirs will actually be noticed and investigated by airport security. Moreover it is not so easy for terrorist organisations to find ‘clean’ operatives: the process of radicalization and terrorist training is bound to bring such individuals to the attention of police or security forces at some point, meaning most such individuals will be identified as potential terrorists and observed accordingly. Security profiling could actually aid this process.