I’ve received a couple of legitimate complaints/inquiries this year. The nature of this little blog WRT Internet-facing ops calls for a blunt instrument security approach. You might lose access on one net, say for example a PC somewhere, but still see the site on another endpoint like maybe your phone. If that happens, you can assume your local network neighborhood has a higher-than-average amount of ne’re-do-wells on it.
If that is inconvenient or unacceptable in any way, please submit a by-IP whitelist request. Otherwise, perhaps talk to your ISP about cleaning up their act.