My reading is this just adds a dialog box before browser loads RFC1918 ranges. At IP layer, a laptop with 128.130.0.123 on wlan0 should not be able to access 10.0.10.123:80, but I doubt they bother to sanity check that. Just blindly assuming all RFC1918 and only RFC1918 are local should do the job for quite a while.
btw, I've seen that kind of network. I was young, and it took me a while to realize that they DHCP assign global IPs and double NAT it. That was weird.
btw, I've seen that kind of network. I was young, and it took me a while to realize that they DHCP assign global IPs and double NAT it. That was weird.