I posted this a while back- I believe all wheeled vehicles, including non motorized, I.E. bicycles, are not to be on the beach.
If I had my choice between Segways on the beach and bicycles on the beach I would take the Segways. Bicycles go much faster and most of the riders have no manners what so ever. But I see no reason to compromise.
Plain and simple- no wheeled vehicles on the beach.
Pogo sticks and stilts are still OK though... ;-)