As an european person who gets lots of spam attempts from comcrap/roach runner and twc especially trucklawyersomewhere@spammy i assume no decent email traffic comes from comcrap ranges et al. so when fail2ban id's hosts they lose visiting rights.
Since comcrap would not action any report of mine without a legal order i sent in your on your own since they dont give a stuff.
Most of that mention stuff never gets seen by us. Do yourself a favour and get a better isp.and if the fcc wont allow that then that is your problem.