Bwahaha.
Yeah, actual lightsaber use would be a bit... odd. I don't think there'd really be any reason to put two hands on the hilt, ever - it limits your reach and range of motion, and there's basically nothing to be gained by strength or leverage on it. Well, maybe if you're winding and binding against another lightsaber (well, they never seem to wind & bind, they just push at the other sword).
Edit: Well, two hands on the hilt might be useful in giving control and reducing the risk to lop off your limbs. /Edit
That might be a cool idea - German longsword -style (instead of Ep 4-6 kendo-style or Ep 1-3 Hollywood faux-wuxia) lightsaber dueling with a focus on wind & bind...