The flight-deck crew is generally anonymous to passengers. We hear their brief comments on the public address system but rarely see them. It might help if the pilot and co-pilot took 30 seconds before leaving the gate to be seen and say hello. They could introduce themselves, say a few words about the flight and leave us with a friendly wave. I believe this would help in two ways. First, it might reassure passengers to see those with whom we have entrusted our lives. Second seeing passengers' faces could be a reminder to the flight crew of all the people who are counting on them and maybe make it a little harder for anyone in the driver's seat who may have intentions that none of us expects.