The problem with making exploration dangerous is that some explorers are out there for months or years at a time. Such people would never make it back if there was even slight unpredictable danger on each jump. Even a tiny chance of unpredictable destruction on each jump would build over hundreds of thousands of jumps to a near certainty of destruction. The only thing that makes this kind of gameplay viable is that the dangers are predictable: you only die if you do something daft. In other words, avoiding the danger requires alertness and skill, not luck.
But marching straight into a black hole, even after the ship alarms would start ringing, perhaps even the ship voice telling you you're getting too close to the event horizon, wouldn't be
unpredictable danger.
Right now you already face some few
predictable dangers with neutron stars, high-g planets, running out of fuel, getting stranded due to lack of jump range and some stellar phenomena. A few more wouldn't hurt. Especially now when there are so many ways to get the ship back to full "health". Al lthat's suggested i nthis thread is to make black holes a bit more inline with other extreme space hazards, like neutron stars for instance.
I like exploration, I enjoy the isolation and the overall sense of peacefulness, I would enjoy the feeling of discovery if there were more than a handful of things to find (hopefully odyssey will help with this) but with time it tends to feel just like an extremely long photo tour, and sometimes I wouldn't mind the occasional space adventure and needing to act/react to some unforeseen circunstances for a change. You know, the kind of thing that makes all those scifi shows we all watched interesting.