These are opening up all over the place around here.
My gut feeling is "Nay", though I keep forgetting to call.
Several years ago there was a privately-owned frozen yogurt place around here that swore that it was save because even if they had a nutty flavor of yogurt, the whole internal workings of the machines were disposable, right down to the spout, so there was no chance of X-Contam. I never felt comfortable with it and never gave it to DS (who knows about the mix itself, in addition to the machine), but I knew several people around here who gave it to their PN/TNA kids with no problem at all.
Anyone ever check Red Mango out?
IDK about PA/TNA there, but a friend in MA loves Red Mango! They aren't in my area, so I have no personal experience with them.
Yeah, fahgeddaboudit - I forgot about the toppings.
Nope, not happening. ~)