In use of Altamurenza's Selectpr mod, I can have it so that members of all factions either taunt or shove the player due to the respect percentage being at zero - but seldom am I assailed by NPCs doing running attacks against me unprovoked. Of course without mods, Damon ''I'mma bust yo gut up and watch you bleed'' (muh fugga) is an exception to that when near the gymnasium, or the Greasers in New Coventry when you organically have 0% respect from them, but all factions don't hate the player simultaneously but at different stages.
I suppose that the phrasing of my question would be: is it possible that vendetta fight music could be initiated by NPCs of any one of the factions at any one time? Because of course, other than after the mission ''Making a Mark'', there's never a time in which faction respect percentages are universally low enough to where everyone attacks the player on sight.
And in case you mention it, I am aware of the chaos mod that causes the whole school to brawl, but they only fight amongst themselves.