Is this something you're seeing personally? If so, how do you know it's because of the Online Safety Act? This is a personal blog and it doesn't seem to have any adult content that I can find. The homepage of the site isn't blocked when I check it here: https://www.blocked.org.uk/check

It tells you when you visit.

Thanks for this! Seems like a bold stance… but the Online Safety Act also seems like a poor piece of legislation.

It is, but Kyle's "protest" is making absolutely no difference.

What protest? If the site is illegal in the UK, he has three options:

1) add age verification to comply

2) cease operating in the UK by blocking traffic

3) operate in violation of the law, making travel to anywhere the UK has jurisdiction dangerous

I don't think he's intending on changing UK society by blocking their traffic because, as you point out, that's not a good way to effect change.

The author is blocking UK ip addresses, presumably out of principle rather than because they’d fall foul of it.