 If an IP address comes through, the only reason the IP address would come through is so that you can reply to it. Now, if the IP address comes through with nefarious intentions, then you won't be able to reply to it because when it comes back, it's going to go back into the great bit bucket in the sky. It's not going to give you the nefarious actor if the nefarious actor wants to remain unknown. And that's really easy to do on the Internet.