8. Taking your shoes off
This habit can be irksome for the majority of passengers and almost everyone can attest to it. There are several reasons why it’s not acceptable to take your shoes off during a flight. The most important one is that it’s impolite and disrespectful to your fellow passengers especially when your feet or socks are dirty or stinky.
However, during a flight, because the air pressure is relatively low, it can minorly narrow the blood flow to your feet, especially in older people. Your best bet to deal with this is to wear loosely tied suede shoes in order to keep your feet comfortable without disturbing other passengers.