That's not how the real world of this sort of thing works. Often the firms hired to do this sort of thing are just catching any/all IPs on a tracker without any analysis. Meaning that said IPs can be spoofed, part of a botnet, and so on which makes the accusations based purely on those IPs as purely speculative. It's why certain federal circuits throw them out since the firms are sometimes found to be outright fabricating the logs in question. And more obviously, that an IP address itself isn't evidence that the user was at the device in question or that the device in question was assigned that IP address at the time recorded. Simply put, it's 99% bullshit hearsay worse than that of your office gossiper.