It's funny, I was out one night with my rear blinkie and I pulled over some local law enforcement and asked about that. He said that off the top of his his "It beats the snot out of me".
He also said that, at least in our sleepy little town, it would have to be one bored cop to cite someone for that and that they're actually grateful for riders make an effort to be seen (and not get hit).

I'm not worrying about it. If someone sees my blinking read light and can't distinguish me from an emergency vehicle, they shouldn't be behind the wheel, anyway.
It makes me feel better to blink so if they want to cite me, cite me.