This is completely wrong. In our area (Silicon Valley) it is common and expected to push hard and work long hours. It is an extremely competitive environment a

This is completely wrong. In our area (Silicon Valley) it is common and expected to push hard and work long hours. It is an extremely competitive environment and unless you're forced to go home most people work late into the night. Not making an effort and letting your employees know that you don't expect them to work nights and weekends means you are ignoring the societal norms in our field and most likely have engineers working their way towards burnout.