Here's the thing though, 4chan has blocked the UK, but they're still being harassed by Ofcom because VPN users can access the site. The British government is run by technologically illiterate idiots who when for not finding brand new ways to screw over transgender people, are trying to make websites and tech companies do things that aren't actually feasible.

“As 4Chan has no assets in the United Kingdom (given that it has no connection to the United Kingdom), that would require you to show up in a US court as a platiff, waive soreign immunity, and overcome existing U.S. doctrine regarding the non-enforcement of foreign regulatory penalties.

—article!

They can also write them a strongly worded letter with a lot of impotently scary language.