You gotta make it to the porch to be able to sit on it.It seems to me that this is a silly conversation, but I'll be your huckleberry. Do you really believe the country could go from zero to total anarchy between the time your son leaves to go to work in the morning and the end of his work day? Seems like shit will be brewing long before that. He may need to make the bugout call before the situation is that dangerous. I'd say some situational awareness is in order, but worse case scenario you can't beat a standard roll out kit, an SB Carbine that fits in a backpack, a pistol in your selected caliber, low profile body armor and a bug out bag with the necessary supplies and equipment to get where he needs to be. The last thing you want to do is look like a full on combatant. LE might confuse the friend foe thing. Other considerations are urban escape and evasion training. Dress to blend in, organic muted colored clothes. Learning first aid and how to hot wire a car might be valuable as well as defeating locks for shelter or cover. Not to mention you the dad, should find a link up site somewhere near the middle that you could safely meet and pick him up if he's on foot. The ultimate goal is to get home and not fire a shot. Let's hope and pray but I doubt it will get that bad without some sort of obvious ultra extreme events.
Personally I'm with Bob A. Gonna sit on the porch and protect the castle.
I do agree with trying not to look like a tango with a satchel charge strapped to your back.