Earlier quoted context omitted.
No, one has chosen to make something available for contact within one country. One is not actively himself reaching across borders to do so. One cannot reasonably be required to take any affirmative action to fulfill the whims of a foreign government. Also, Britain isn't important enough to make this stick against e.g. an American. If someone writes me a letter asking a question about material that is prohibited in h…
What is having your web server send IP packets with an IP address addressed to an overseas address to your ISP who you have signed a contract with to have them deliver those packets to the designated address if not actively reaching across borders? That's what happens when you respond to a request after all. (Up to very minor nits, e.g. you might be paying a cloud provider instead of an ISP).
The network infrastructure is the thing that is performing the delivery that is actively reaching across borders. Not the webserver.
The entire HN submission is full of people saying that it is the UK networks responsibility to make sure that their laws are upheld and that anything happening inside US borders is simply people going above and beyond in assisting the UK in the pursuit of the enforcement of its laws. The geoblocks on the side of the webserver are a form of optional assistance and a sign of goodwill.
Meanwhile Ofcom seems to be of the opinion that this isn't enough yet they simultaneously do nothing about the violators physically located in the UK. This means they are going out of their way to make an unenforceable and impossible to implement law so that they can manufacture probable cause.
Website operators can give the UK a list of IPs to block, which would make it very easy for the UK to enforce their own laws even against VPNs, but it is only the UK that is capable of doing that, and they are shirking their responsibility onto those who can't do it on their behalf.