You are moving the goalpost. I was referencing the "murder ad" comparison. There is nothing about advertisement in DNS. Nobody is browsing DNS records. IP or SNI blocking are similarly intransparent.

You can block wherever illegal content is linked, or indexed, if you have to. Not on the infrastructure level, as that's distorting reality and is very annoying to fight.

But really, just pay a few more investigators and take down the offending service, if you got legal cause, instead of this sneaky, lazy shit, which is easily abused and sets a bad precedent.