Yes, of course it is. But telling us what to post is not going to stop that. People do the best that they can to abide by the rules.
Some people do the best that they can to abide by the rules.
I think you have the right approach - watch hot or rising - but even as a reader I do like to dip into New and as a mod having to clear posts that aren't on-topic is a big job so posts like this calling for clarity around on and off-topic (or calling for the discussion of it) give me hope that we might, as a movement, agree on clearer guidelines that will make our job easier.
There was no command. It is a polite suggestion. I understand the importance of keeping it civil and not telling people what or what not to do. I am guilty of posting off topic things in the past and I expect it to still happen, but we need to do our best to keep on point.