This isn't a poll, but I will jump in with the "yes, I fly IFR, at night, over the mountains in a single engine plane." Why? Generally because a) I almost always file IFR when I fly, b) because sometimes it's night when I want to go somewhere, and c) because sometimes there are mountains between where I am and where I want to go.
I fly quite frequently, so I am current. It's my plane, so I know and trust the maintenance.
I make no judgements about what others may or may not do. However, there are so many of these operations that go on every night without incident, I do not see why some would call this categorically "unsafe" or those that do it "stupid."