They don't refrigerate tomatoes at all at the grocery stores, although they do come on refrigerated trucks. They typically get offloaded and put on a shelf in the back to ripen, or out on the sales floor if they are already completely orange or red. The produce manager at my local store always saves me a green one if they happen to come in that unripe, because one of my favorite treats is fried green tomato slices on a hamburger.
We never store tomatoes in the fridge here at home...heck we usually don't even store them inside, in garden season. I'm allergic to raw tomatoes, and the smell of too many ripe ones in a small space makes my nose run. We have a picnic table on the north side of the house that the tomatoes get stored on, under an old screen to keep the bugs and birds off.