I found it very interesting to read your comments on the relevance of MAC and IP addresses, which sound perfectly understandable to me. Do you know that in some jurisdictions, responsibility for unlawful acquisition of data is allocated by the courts on the basis of such addresses the claimant researches as the place of violation of protected rights regardless whether the owner of the device was aware of the facts or not? There is no escape to this, unless the respective owner can prove that and who did use this address without permission and that this individual is legally responsible for such action.