Great post and great points.
Here's something else to consider:
In the event, God forbid, that you do have to defend yourself and your family from persons wanting to harm you, and you use deadly force, you can bet your backside some down-on-his-luck ambulance chasing lawyer will use your words, on this site and others, to create even more chaos in your life.
Joke or not, your words will be quoted and you could be conceived as a person with a desire and propensity for gun violence. Many juries won't be able to understand the truth, and you and your family may suffer.
Your words may bring the same issues for other board members and fellow firearms enthusiasts.