(Is this post free-for-all?)

Let's see how it analyzes.

• User who wants to make a post with Rule 1 suspended is free to flair it.

• User who breaks Rule 1 in post without flairing can be disciplined because he was free to flair and didn't.

• Mod is free to retroactively flair a post so as to extend mercy to violations in the thread.

• User who wants to comment with Rule 1 suspended will find threads where they can.

• User who breaks Rule 1 in comment without the post being flaired can be disciplined because he is disrespecting the poster's choice not to flair.

• Users who believe in abusive language for funning and camaraderie among each other have full rights to engage that in their own posts but not to engage it in others' posts without poster's or mod's permission.

• User is free to message mod or poster to add the flair to allow suspension, even retroactively.

That sounds like it accommodates everyone's desires pretty well in different regions of the same forum! Well done. The only minor difficulty I see might be those who comment rashly in the feed might assume a post is free-for-all when it isn't, but that can be worked out with a little discussion and understanding. Oh, and the new flair might drown out older flairs, but they didn't have that much utility to start with.

I don't see any downsides to this proposal. I've already flaired a few of my posts as free-for-all.