If its a hotspot you'll have to login to authenticate, so presumably the traffic is uniquely identifiable. I'd hope when LE contact ISP for details theyd be able to go oh that ip address is here but it was actually this persons traffic.
I'm fairly confident that ISPs do not log all customer traffic, especially for an indeterminate amount of time. There would not be enough storage on the planet available.
I'm fairly confident that ISPs do not log all customer traffic, especially for an indeterminate amount of time. There would not be enough storage on the planet available.