doesn't sound totally unreasonable to use if something was removed/hidden from DMCA takedown or someting
What? Can you post the full error message (HTML/text?)
On what grounds is someone blocking DefCad's website?
This is what the response looks like (I added it to Wikipedia): https://en.wikipedia.org/wiki/HTTP_451#/media/File:Status_co...
And this is why: https://www.attorneygeneral.gov/taking-action/press-releases...
"the company agreed to block Pennsylvania users from its site"
If it was being blocked at the ISP level, then I would be concerned.
Your ISP is blocking with 451?
That's actually a legit status code:
https://tools.ietf.org/html/rfc7725
451 Unavailable For Legal Reasons
> This status code indicates that the server is denying access to the resource as a consequence of a legal demand.
I'm in Pennsylvania, and I currently get a "451" error code when visiting the DefCad website. I've never seen in the wild before. A bit scary.