In that case, do you think JB was somewhat justified in his actions?

If it was in the intimate confines of a small club, yes. The previous time I saw Chris Knight (also an acoustic show in a club) a lady in the front row kept hollering "I LOVE YOU CHRIS KNIGHT!!!!" at the top of her lungs between every song. Finally, after about 10-15 minutes of this, Chris said, "I heard you the first seven fucking times, lady!" After that, you didn't hear a peep out of her. It was obvious that he didn't want to have to be put in the position of admonishing her but someone had to say something as she was taking away from everyone's enjoyment of the show. There's a real fine line when it comes to concert etiquette in situations such as this. In some settings it's expected of an audience to shut off their cellphones and keep chit-chat to a minimum. Whereas, in a bar there is going to be some chatter but the least people can do is be respectful of the person performing on stage. When this crosses the line to the point where people have their back to the stage, talking to others and on their cellphones, then I think the performer has every right to say something. Like I said, it makes me wonder why people would pay $15 (and up) to go to a concert only to talk through the entire thing.

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Getting all excited finding nothing that was never there before is like bringing flowers to your Mama and tracking dog shit all over the floor
From "Cartoon Gold" by the Drive-By Truckers from the album Go-Go Boots

That's a damn shame because Chris Knight is incredible! What's your favorite song? Mine is either "Down the River" or "Crooked Road"

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Bless me father, yes I have sinned. Given the chance I'll probably do it again.

Not sure if I could name a favorite right off the top of my head but his work is pretty consistent, lots of real gems to choose from. I realize he attracts a rowdy crowd, that's somewhat expected but the lack of respect is mind boggling. I'm not sure if Knight just doesn't give a shit anymore or has just accepted the audience's behavior. Sometimes, a nice, firm "shut the fuck UP!!" is all it takes. I'm not expecting everyone to be quiet as a mouse as though they're in church but at least be respectful of the man on stage (who you paid to see) and those around you who came to hear HIM sing.

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Getting all excited finding nothing that was never there before is like bringing flowers to your Mama and tracking dog shit all over the floor
From "Cartoon Gold" by the Drive-By Truckers from the album Go-Go Boots