So yeah, I um, slipped and fell into the Singularity drive and couldn't get out! Since I couldn't leave ship interior there, had to log out into character selection and back. Luckily I was in the turbolift when I returned.
I also had this... 'problem' and reported it in game via the bug report menu. I assumed they had the invisible walls to keep us from falling... and we all know what happens when we assume. This bug was more humorous then annoying.. that is, until i realized that I didn't die from the fall.
I think they should keep it open and fry you if you somehow find your way in there.
I jumped down there to see what would happen.
^This, borrow the effects from Nukara prime, if you jump in the pit you die as burnt toast or apply the Romulan space destruction animation to characters, you go down there you get squished painfully into an itty bitty ball of goo.
It's a freaking power core, very bad things should happen when you go in there.