"There is no 100% certain way to identify a unique user to a unique computer. " well no that is not quite the case ok screw it...dna samples then! Embedded biometrics ? lock it down like the pentagon! eyeball scans, fingerprint scans? There are networks that have this sort of thing and they are getting quite affordable, a bit on the outlandish side for a chat site. Point is the current methods and secret decoder rings, are not quite working. If there are multiple people getting nailed through the current methods...then there are possibly many not getting caught? Just tossing around ideas.