I have found the macadmins Slack-channel to be a great resource

Yeah this needs some sources to be taken seriously

Put a sign "staff only" on the door

Absolutely. These people's lives ended in unimaginable terror. No matter who they were, it didn't need to go like this.

Please create a new thread instead. I'm not sure of the etiquette over here yet, but hijacking threads and going off-topic is generally frowned upon. For what it's worth, I didn't downvote your post, but it looks like some other users didn't appreciate it either.

While I think your question is valid and I'd also appreciate discussion on that topic, it might make more sense to ask it as its own post instead of commenting on this post regarding the server error page art.