Kill blocked adbusters

[mjangda]

For any known adbusters that we've nixed, we should serve a nice 403 page :)

[paulgibbs]

Is there any disadvantage to these ad vendors if we return a 403 instead of a 404, or any advantage to us?

[mjangda]

No advantage either way as long as we wp_die()

[natebot]

Is this still an issue? I'm wondering why 403 is the right signal to send. Isn't it the case those resources are not to be found, and not just forbidden to be accessed?