I agree, but niusca is right. You can't always control every situation, and in situations where you have limited control over your environment, you need to help yourself. That is why, as someone who is always hot on planes, I travel with a portable USB-powered fan. It's come in handy in many situations (both in the air and on the ground) that I couldn't have predicted ahead of time. If I were on OP's flight, I'd be sleeping soundly while the OP is still arguing with the purser.