I am using an LTE dongle for internet connections.
Yesterday after some reconnections I couldn't reach any SE sites.
I checked with Tor and could connect. It appeared that I got some IP address that had been banned by SE.
I reconnected, got another IP and it all started working. Today there were some problems with the ISP, and the dongle reconnected a few times. Finally I got some banned IP again.
Is there a policy that has some time limit for banning this kind of pools? Otherwise, banning many IPs will affect normal users.
The question is about IP pools used by wireless or other ISPs for dynamic IPs. Banning those permanently makes no sense, because these IPs don't stay long with one user.