The nature of the subject matter triggered our anti-spam incentives. I have approved your previous post now.

As for your questions about how an IP can get you caught, it goes further than you think. Even if he is e.g. leeching someone elses WiFi connection or isn't the owner of the subscription, unless he's using some public hotspot, it is very likely, that when the owner is notified, he/she will know the offender.

Also facial recognition software is becoming more and more common, so if the police have his picture from video sessions and most likely even from several angles, it will be quite easy from them to use it to prosecute the offender.