Saw a GSX-R1000 with an aftermarket HID system at the weekend. Even in daytime it was far too bright. I'm not exaggerating when I say it was exactly the same as looking at an unfiltered welding light. Other people I was with commented the same, one said he could only see people's silhouttes for a few seconds after looking at it, as the centre of his vision was filled with the after image of the light.
So, on the one hand, potentially dangerous retinal damage to any poor sod who looks at it, on the other, SMIDSY will be increasingly hard to believe.