"In other cases, Weaver said, stars that are not close enough to a black hole to be torn apart could be instead spun up to 60 times their normal rotation speed. In other situations, "a star could actually be swallowed whole," she said, and there would be little or no radiation to mark the event."

Hmm, that's interesting. What happen when a star is "swallowed whole" without leaving much trace.
Probably a really rare event, I assume the star would have to hit it dead on. Let's see assume a large black hole with event horizen the same size or larger than star's diameter. As the star approached the black hole it's center of gravity would shift towards the Black hole. It seems to me that the star would form into a disc shape. Now, a star works by being under pressure and some of this pressure would remove from the core on the side away from the black hole and would increase on the sides. Hmm, I wonder if the heat could be released resulting in a collapse of the star- & would there be enough time for it to collapse?