> censorship, the suppression or removal of writing, artistic work, etc. that are considered obscene, politically unacceptable, or a threat to security

It is not the responsibility of the Tier 1 or the ISP to configure your server securely, it is their responsibility to deliver the message. Therefore it is an overreach to block it because you might be insecure. What is next. They block the traffic to your website because you run PHP?

Similar to how the mailman is obligated to deliver your letter at address 13 even though he personally might be very superstitious and believe by delivering the mail to that address bad things will happen.