If you ban an ip range you will be banning more than one person.
not at all, we know every single user that is banned for each IP range
How do you know that?
1 year of OFP logs on 4 servers, you scan an IP range for users like this
Search term would look like this "acc(82.34."
the display then shows every user who ever used that range
most ranges will get a single hit, most ISP are on several rotating IP blocks, so it does not take long to enter the offenders name like this " 'NaMe' "
and we see his IP rotation, if there are two users with that name or more it takes a few minuts longer but thats easy since thier IPs wont match
and after a year, even if you use a different name or ID, I scan the offenders IP range and I get his used names
pretty simple