I did when MUCH younger, and when a lot of my hunting was along the east coast, like the OP. If you were able to sneak up on an eider or scoter, you took the shot. Those birds generally dive to escape, rather than fly. They'd just pop up about 100 yards out & keep swimming. Since moving west, where the duck hunting is far, far better, there's just no need. Any bird that swims into the dekes just adds to the effectiveness of the spread. Any that sneak by and land before I get a shot, get a free pass. When jump-shooting, I wait 'til the birds actually jump. And I'm with The Spank on killing shots. A sitting bird is much harder to kill cleanly, unless it's a head shot. I finally found some #7 steel to use for head shot cripple rounds.
Thanks, Gatehouse for attempting to improve the spelling of the forum, but efforts along these lines are generally met with abuse and scorn from the illiterate masses. I'll sign up for some of that by pointing out that the term so often butchered these days is actually "I couldn't care less", as in 'I do not care at all'.