About 15 years ago, I was in an IRC channel—I'm not sure whether you're familiar with that forum—and someone was selling credit card numbers, along with the three-digit code on the back and the billing address. Everything was ready to go. The person was offering to sell them to people. I felt that was wrong and I wanted to call the police or some other authority, but no one replied or knew what to do.
If someone saw something similar happening on the Internet today, is there someplace they could call to report it?