If 4chan continues to ignore Ofcom, the forum could be blocked in the UK. And 4chan could face even bigger fines totaling about $23 million or 10 percent of 4chan’s worldwide turnover, whichever is higher. 4chan also faces potential arrest and/or “imprisonment for a term of up to two years,” the lawsuit said.
Given that’s how the entire Internet works, it does stand on its own terms. The UK isn’t influential enough to force the entire Internet to follow suit. They can take it or leave it.