IPs aren't stable. For instance, the legacy SSID broadcast all across my university assigns you a new (usually different) fully routable public IP every time you authenticate through the captive portal. Some random person enjoys the "trustedness" of your IP at the time of login; you never see it again.
There is a new SSID with WPA2-EAP replacing the captive portal and the usual DHCP/NAT business replacing our massive waste of IPv4 space, but that was implemented last year. This introduces the opposite problem: one person out of thousands can't remember their GitHub password so GitHub mysteriously drops all traffic from everyone on campus.
IP addresses don't identify people, computers, or usefully discrete units of any kind.
There is a new SSID with WPA2-EAP replacing the captive portal and the usual DHCP/NAT business replacing our massive waste of IPv4 space, but that was implemented last year. This introduces the opposite problem: one person out of thousands can't remember their GitHub password so GitHub mysteriously drops all traffic from everyone on campus.
IP addresses don't identify people, computers, or usefully discrete units of any kind.