Simple, before any take-off or landing ensure that your passport and wallet are in your pockets. Then if you need to evacuate you can do so with you hands free to assist yourself (and any others who might need it) and not clutter important exits with unnecessary baggage. To do anything else is to display your utter stupidity and put others' lives at risk. The other option is to stay away from aeroplanes. You are told not to take you cabin bag for a very good reason. Just listen and stop trying to be the 'wise guy' while showing your stupidity.