Airports - busy places.
Most people you find at an airport will have a vague idea what they are doing there. Those that don't are probably visitors rather than staff.
If you spend any money at an airport and expect to get it back on expenses, you'll need a receipt and at least a token reason for it being a legitimate expense.
When someone working at an airport screws up, they tend to get bollocked for it rather than promoted.
An airport will offer a service to move a few hundred people half-way round the world and back for a few hundred quid each, rather than charging a million or so to take 'em on a return trip from Brussels to Strasbourg.
You can take a photograph in an airport, usually without some heavy handed security type confiscating your camera.
A photograph taken in an airport is very unlikely to depict somebody signing up to receive money they are not entitled to.