Harsh words at the social security office

I had to go to the social security office today to register myself for whatever meagre benefits I may one day be entitled to, and there was a large, particularly draconian notice there that rather caught my eye. It went something like:

WARNING!
IT IS A FEDERAL OFFICE TO KILL, KIDNAP, ASSAULT, THREATEN OR
OTHERWISE INTERFERE WITH A MEMBER OF THE STAFF OF THIS OFFICE.

You'd think most of that would go without saying...