The stealth riders remind me of the little kids playing "peek" who think they disappear when they cover their eyes.
I also note that a significant number of stealth riders ride on the left side of the road, going against the flow of automobile traffic and against the flow of bicycle traffic.
Stealth riding, to me, corresponds to adolescent arrogance (and I hope you don't like it).
Grow up.
If you ride at night get a real light...and ride on the right.