I have never blocked an ISP, please tell me what you think is blocked.
maybe you have made automatic blocking on some IPs that you suspect are used by botnets
but unfortunately some of these IPs are the Dynamic IPs owned by the largest operator in our country.
so that anyone who uses that IPs will be automatically blocked.
I think this will block the way for that ISP customers to your site
so this is the same as blocking the ISP, because sooner or later the users will use the IP address that is included in your blacklist because the IP they use will continue to change as the Dynamic IP works.
and for botnets who may have used the ISP only need to move to another ISP.
so I think the effect will be worse for genuine users than for botnets.
Why not just send TheQuin a PM with the IP address of the ISP and he can validate and unblock it. I think it would be reasonable to assume if a lot of bots are coming from the same ISP or region, then the service will block the access to that ISP/Region.
I know the faucet income was different, based on the location of the traffic, when advertisers still paid for faucet traffic. So based on what they did with that, it would be reasonable to assume that they can filter quality ISPs from ISPs that are just used for bot traffic.

I asked twice but without a clue to even which ISP he's talking about I can't look into the complaint. There are databases of IP addresses with location, ISP and usage type. I can also look at the usage we get from any particular network and it is pretty easy to see where there are large amounts of abuse going on.
This is not the village idiot's shitbot thread. Please respect the forum rules and go and discuss it somewhere else.