Yesterday on flight 1771 something happened that I don't think I've seen since the pre 9/11 days. As soon as we hit 10,000 ft the seatbelt sign went off. And it stayed off until approach into ATL. And we even had some light turbulence! Usually they switch the seatbelt sign on if someone even breaks wind. So good job to the flight crew of DL 1771 yesterday. Please, share your common sense approach with your fellow pilots.