I would be okay with stealing ships in such a fashion. Preferably near enough to the coast so that we can first direct it at such a distance that they could swim for it.
No need to massacre entire crews of sailors on the regular, after all... those are our subjects, after a fashion.
Edit:
Though to get away with this, you couldn't just pick up the ships like Superman or something. We don't have tactile telekinesis, and they're harder to repair than a building.
I'm pretty sure if you lifted it outright it would snap in half.
We could empty the ship of all people, get underneath it while it's in the water, and then teleport it though. Functionally zero difference.