Access forbidden to Kubuntu forums

When I try to access the website kubuntuforums.net, I am greeted with the following nasty message:

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   403 FORBIDDEN!

Either the address you are accessing this site from has been banned for previous malicious behavior or the action you attempted is considered to be hostile to the proper functioning of this system.

The detected reason(s) you were blocked are:
Bothost and/or Server Farm. Not an access provider ISP (credit: eclecticdjs.com) (HN-0034).

Your IP, Domain Name (if resolvable), the referring page (if any), QUERY, POST, User Agent, time of access, and date have been logged and flagged for admin review. Please either 1. Stop the bad behavior, or 2. Cease accessing this system.
The webmaster of this site has decided to provide you with an e-mail link to start a trouble ticket about this block.
Please do not change the beginning of the subject line, nor the preamble of the body text.
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This is my home PC. I have had this IP address for many years.
I am a FOSS developer:
https://github.com/CyberShadow

I have asked to be unblocked three times via the included email, no reply. The last one I've sent just now, but seeing as I got no reply for the past two, I do not expect one now.

There are a number of issues here:

1. I am wrongfully blocked from accessing the website.
2. The message is unnecessarily aggressive and intimidatory. I am certainly not engaging in "bad behavior", and I think it's unreasonable that I "cease accessing this system" because of an error.
3. Unblock requests apparently go to /dev/null.
4. The "credit" URL is now dead, and leads to a domain squatter spam page.

As I can't access the forum, I cannot bring up the issue there. The Ubuntu bug database is the closest avenue I could find to report this problem, after the forum and the supplied email link.

My three unblock requests have the message IDs:
<email address hidden>
<email address hidden> (this one is for another IP on the same ISP)
<email address hidden>