On my CLT-GSO flight recently, we received no drink service. It was mildly turbulent - I mean truly mild and episodic. When I asked as we were deplaning, the FA snittily responded "because the Captain told us to stay in our seats. We're not required to risk our safety". Granted, it was a short flight, so it's not like I was really inconvenienced.. still.. it would have killed them to explain en route? The "turbulence" didn't stop them from getting up to get their novels out of their carryons..