It made for a different war in the book. You had to go through new wormhole stealthed so that the enemy didn't see you, in case it was closed and they were unaware of it, and never go through a closed wormhole unless you were 100% certain there wasn't another stealthed ship watching. An ally made that mistake and they lost one of their homeworlds. Later the good guys find a closed wormhole to one of the enemies 5 homeworlds and wipe it out. The enemy survive the war, unknown to the good guys, but they are in a closed system with only a single planet. If they ever come out they will be detected and their race exterminated.
MasterChiToes said:
(especially if you can hide those horrid little broken warp lines on the galaxy map).
oh right, I forgot about those. Yep i've been using them. I was wondering if I'd found all the warp points in a system then realised it showed all the directions it went.