> You can make it illegal for your own citizens but you can't regulate a foreign business
The us does that regularly. There's thousands of companies that cannot do business with entities from countries like China or they can face criminal charges in US.
A former company I had as a client, EU based SaaS faced this.
But to be clear, those businesses wanted to make money from the US market. In the case of 4chan, they don't make money from the UK. Somehow, this important distinction keeps getting ignored. You want to sell in the UK market, you have to follow their rules. Same with the US. Somehow the British government doesn't seem to understand this.
