probably crichton's sphere. his ship could go through a black hole and back in time, but a few charges of c4 destroyed it. that's so absurd.The last black hole opened up inside Nero's ship when Spock rammed it in the Jellyfish. The Narada was being crushed into it.
The idea that black holes are a means of magical transport is an old one in sci-fi, but I have no idea where it originates.
the term black hole was coined at the time tos was produced. before they were known as black stars.
so what protected the narada passing trough the wormhole? shields? it's like a paper protecting from a nuclear blast. they have multifunctional shields, don't they? good against beam weapons, projectiles, time distortions, and even gravity is rendered harmless. could have erected a force field around the black hole in the interior, the less advanced enterprise-d did that in every other episode.