potentialpredators.com Scam, Blackmail, RipOff, Slander Internet

I was recently sent an email from potentialpredators.com telling me that I had been entered into their system as a predator. I thought ok this weird, I clicked on the link and there was a picture of my google plus profile picture and my name. I do not use this email address for anything except school, work and online purchases. It tells me that if you would like to take your name down, you can pay $100 dollars and to have your name removed. Obviously this site is bogus, what site would let you take your name down if you were in fact a predator? If anyone knows what to do in this situation it would be much appreciated if you could help me out.