Mutual combat is irrelevant. If a cop saw you say that, and decided he didn’t like the cut of your jib, he would have hauled you off saying the hobo’s threat was not credible but yours was. If you didn’t like it and jump fast enough, it’s Disorderly Conduct for you in addition to the assault. There would be no concern if there was no chance charges would be filed, they don’t care. I’ve heard cops brag on FR about how they’d arrest people for “Disorderly Conduct” for the sheer fun of it, to humiliate them in public.
Society has gone to Hell, quite a long while ago.
Ah... Here it is. In Louisiana it’s called disturbing the peace.
http://law.justia.com/codes/louisiana/2006/146/78253.html
I don’t think my defensive comment would meet the elements of offense.
But I do hear you on the corrupt state of police officers who ruin it for all law enforcement officers.