[Gryphin]

The hapless mine layer was damaged in a warp point. The warp point leads to a black hole. It has been sitting there since I found it. When it fell into my possesion, (after forcing the owning race to surrender), It still had mines onboard. Since it was a drain on my resources and I could not destroy it, I gifted it to an enemy AI, (and they accepted it).

I'll have to check on the "Avoid System" selector but I belive it is under the Empire button. You then mark or unmark systems as desired. If you don't use this, the AI will take the shortest path including through destructive warp points and black holes.
Not "smart", Experianced.