Wait, saying "They're all ----ing gone" is a crime? Wow. I should just go surrender myself to the authorities. Now, there are, of course, two sides to every story, but I can't say that citing someone (and cuffing them, apparently) for swearing is something that would cross my mind unless it were truly "disorderly": refusing to stop, continued, louder than normal conversation, etc.
Reading the article, it looks like he was going to stick with the written citation. When she became belligerent, he decided that for his his protection, she needed to be handcuffed. I think there's a little gray area between being "handcuffed for the protection of law enforcement officers" and "being arrested", but the fundamental point is the same: why?
There's more to this story than a woman saying the F-word to a relative about the inventory of the store.
This should have been a "Ma'am, there are children present, can you please watch your language?" conversation and nothing more. A citation was a bit much, and the handcuffs were too much. And he had to take her out to the car to get the citation book? If you're prepared to handcuff someone, why aren't you carrying your citation book?
Of course, how many people know that there are people with arrest authority that aren't cops? One supposes that fire marshals would have arrest authority (and the ability to issue citations) over things involving, you know, fire, but everything else? If you ask me who can arrest people, the only people that spring to mind are are police officers and deputy sheriffs...fire marshals don't even jump up and down in the back of the room waving their arms for my attention.
On a related note, I think it's safe to say that I'd be a little belligerent if someone handcuffed me that I couldn't easily identify as a peace officer with that kind of authority. And, "I can do this" isn't sufficient. In this day and age, there are too many wackos out there with L&S on their car...