This website has recently become a target of relentless spam attacks.
Some dumbasses (probably bots or worse Russian hackers) post unrelated messages and such. Possibly looking for exploits in the security system.
I pride my self in openness to any meaningful content and do not want to pre-moderate comments or make registration (with email verification) mandatory.
So I subscribed to https://www.abuseipdb.com free API service that checks user's IP address before allowing to post any comments.
If you by any chance are wrongfully denied access, just let me know and i will clear the block.
On my part i will ban and report spammers with extreme prejudice. Let's make internet spam free one IP at a time!
For webmasters here is plain PHP code i used to enable IP checking and reporting: