well, it's just up to you. just tell you 1 thing.
A, B, C, D, E, F, G are your players. All of them are using the same internet provider: X, which gives dynamic IP.
C got IP no. 1 and had a bad idea that he attacked your server. fail2ban recognized it and ban the IP.
The next day, other's IP restarted. C got IP 2 and do it again to your server and got banned again.
The next day, D got IP 1, and F got IP 2. both of those IP are banned. then, your players would think _______________ <fill in the blank by yourself~>