Good story, it was worth the time it took to read it.  

It's not my business, but I'd cut the cursing at/within earshot of the clients. Could offend them & they'll take their business elsewhere next time.

You know, I'm not sure.  I suppose that depends on intent.  If they had booked me to do secure transport and wanted a carload of armed men to follow us around, then I'd assume I would.  I'd probably need a bond for that too.  I don't think its a problem carrying for my own protection though.  The police officer in the story knew I was armed and had passengers, he didn't ask to see anything like that so I'll go ahead and take that as a sign that I'm A-OK.