I also just re-registered. I don't know how long it's been since I registered the first time. I think the time was over. So if you haven't registered in a while (what is it 5 years?) then you might want to give it a try.
I just received a call from someone who did not identify themselves but insisted that a home emergency alert system was being delivered to my home. I told them I was not interested to which they kept going on insisting it was paid for etc. This call came in at 12:45, July 15th 2013. I am on a do not call registry but that doesn't seem to matter to these people. I attempted to call back and was informed all the lines were busy. I doubt it. This is definitely a scam.
Thank you