Finding myself in american court in the second scenario in the list of preferable scenarios right after finding myself in third world country prison. So if I'm there I consider myself already gone regardless of any argumentation.
In other courts on the other hand in cases about copyright violations even if accuser provided IP address, logs clearly indicating defendants computer the case was dismissed because he still failed to indicate that it was in fact the defendant that downloaded and/or served the copyrighted file in question.
I'd say same way there's no possibility anyone could prove that it was I who checked the checkbox.
