My discussion board has a trap that determines registrants that are automated spambots, and it works nearly 100% of the time. I'm able to determine patterns over time so I can add to IP range blocking in .htacess as necessary. I temporarily block access by IP address otherwise, especially if the miscreant comes from an ISP or other non-webserver range.
Now here's the rub... I'm seeing a lot of these spambots coming from Comcast home Internet users, and I've found that some real human users of my board come from Comcast. So, hypothetically, I could be having occasional false-positive blocking going on.
Reporting spambots to Comcast seems to bear no results, as they don't respond to me, and the spambots keep rolling in. I provide all possible info Comcast would need to figure out where the spambot is coming from and specifically what they are up to.
I'm frankly a bit tired of preparing these reports. And I'm not sure there's a good way to automate them (yet).
Does anyone have recommendations on how I can proceed with dealing with spambot registrations from Comcast and other ISP users more effectively?