Maybe I'm my employer? Maybe I only work a few hours a day at my nice employer and an email here and there in my commute is no biggie? Maybe there's many other

Maybe I'm my employer? Maybe I only work a few hours a day at my nice employer and an email here and there in my commute is no biggie? Maybe there's many other reasons why I want to send or read email? Please do what you want with your time. Use your bus/train time for what you want to do, which includes voluntarily giving away that time at whatever cost you want.