#37: Not a Good Time
To follow on from the last one: flight attendants have all the training necessary to help in the case of an emergency. However, it might have been a long time since they had a training class or a refresher course, so if it looks like they are concentrating on making sure they’re prepared for an emergency, don’t distract them!

I mean, as a general rule of thumb, you probably want to tread lightly when trying to flirt with someone who has to worry about the happiness and well-being, and safety of a couple of hundred other people. Also, they’re trying to do their job and they have a lot on their plates! Maybe the rule should be flirt with them only when they’re flirting with you.