Seems like doing nothing to the back side could cause issues with the tire trying to twist on the wheel. Obviously low power, slow 60' cars might not see this issue if the tires are glued on the back side, but some of these insane power x275 cars, I could definitely see it being an issue. A bottom 5.0 car on a 275 is nothing earth shattering these days, but in the grand scheme of things is no bitch either.
I have absolutely zero pro 275 tire experience so you probably should not listen to me.