The mention of potentially breaking criminal wiretapping laws is a seriously inane red herring, to commit a criminal act the person must have criminal intent this is the basis of nearly all criminal law, the criminal act and the criminal intent, no trails are usually brought if one or the other is missing, these precepts are the keystones of most countries criminal law, Actus reus and Mens rea are the legal terms to look up, the facts here are plain that the activity is undertaken with a research view in mind and may even have legitimate application for future law enforcement thus by sticking to this ethos they have not in fact broken any law and thus cant be prosecuted as long as they have documented their project in such a way as to show they are simply undertaking research that may be of interest to academia, even if no one else.