I'm torn. Appears to make sense from a safety point if you want to be seen.
But I hate those &%&^%&* flashing headlights. Makes me think a cop is coming and I should pull over. Could be dangerous trying to find a place to pull over quickly, then find out it's a regular bike. Plus, if like my mom, I had epilepsy, a flashing strobe type light could send her into a seizure. Could pose a danger if she was allowed to drive, probably not that great even if she's only a passenger either.
But, I guess they work!